Malicious PDF — malware analysis report

Static analysis result for SHA-256 9248183b1c8e9266…

MALICIOUS

PDF

89.3 KB Created: 2021-07-30 23:42:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3cdce2214429a8d4b4c7befaddb81eb1 SHA-1: 24b063a1a5966f89073fb5ee696aa467d6fa7696 SHA-256: 9248183b1c8e9266cc069286261709f42ab990e279312f350dfb708bb6d23c0d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV also detecting it as a phishing trojan. The document contains a link farm pointing to multiple compromised WordPress upload directories, suggesting an attempt to distribute malicious content or phish for credentials. The presence of urgency language further supports a phishing or scamming intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9945

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://swalaya.in/userfiles/file/xevag.pdf In PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/346ef00c6431f2ef87f7d9d3e4aac543/rafudofapo.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab5bbc5af0---woganodojekuzufuze.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/9dq6j16griuf03llprcpvt0epj/tijelefovogixutetisosok.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/a13hc9uvdalmeb4cnclqtuobg2/10500251521.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc0f1033ec---fezuwemelemedo.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/e01d5c2pp0gcldkujef9h16uu4/gunojuturesisop.pdfIn PDF document text
    • http://ibrahimalsada.com/pics/file/gizokaxumet.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/9f7aaef1527fb1fbf2ce6b64c6ff24cf/jijexeno.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f38f608be3---99752742267.pdfIn PDF document text
    • http://keiganproductions.com/clients/863431/File/32365605754.pdfIn PDF document text
    • https://elemonbg.com/Files/File/jexifapuxixisa.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16075a518da41a---38230352714.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609c4836048d5---72262925064.pdfIn PDF document text
    • http://lbhs1965.com/clients/6/6b/6bdd8f708684a1f547efbf97e1630fe5/File/87913669027.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/99e01ff9e7b8d3216e1c474e8b0db768/derolilujinera.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/2bb43f8e203a391fa12cc57a2ad8970e/12889730952.pdfIn PDF document text
    • http://www.ocptecnology.com/admin/uploaded/fck/file/12697495494.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae13ae1077---fupunuzuruxopitu.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/vtgbhprihc4rccdahr8l04d9g3/43605126007.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160731d00b6ff6---puwurezebabovuxagugamomis.pdfIn PDF document text
    • https://xn--mietkndigungsrecht-best-gpc.de/userfiles/file/46070538849.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9ba2fa7075---bijekupokaxaj.pdfIn PDF document text
    • http://ligneus.hu/upload/file/banapemexed.pdfIn PDF document text
    • http://tinavaron.com/ckfinder/userfiles/files/75923039592.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210627191538106.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160740a716f20a---roxatuzurumopagonex.pdfIn PDF document text
    • http://rialta.ie/userfiles/files/11343118015.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=lego+ninjago+masters+of+spinjitzu+season+11+episode+26PDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7FD 11384 bytes
SHA-256: d184f2965b5e80af6fb80f65006ebe3a5b89400372a00db2eef48ced6e3edaaf
font_01_sfnt_off000112b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112B4 16816 bytes
SHA-256: dbb94f82223cef6ae56be3623fcd81575d6d084c4d86b2ae4fc2e5d74da84a2c
font_02_sfnt_off00013e15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E15 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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