Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ed59fa1f16531a1…

MALICIOUS

PDF

96.4 KB Created: 2021-07-17 04:30:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ba194a465bfd576a53f2053fc0ca1c0d SHA-1: 3467f5b5dd1b54d92e9f4355590329e2af4ae976 SHA-256: 6ed59fa1f16531a112b100dc1184a0eba443a0565838764227995555c3967b5b
176 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with multiple heuristics indicating it functions as a link farm. The embedded URLs, including one pointing to a raw IP address and others hosted on compromised CMS platforms and disposable domains, strongly suggest a phishing or malware distribution attempt. No scripts were extracted, and the document body was unreadable, but the prevalence of malicious links is sufficient evidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • 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://deltagroup.bg/uploads/file/bezidekusukopisivam.pdf In PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/vurimejojanumejivido.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/78406263695.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/o3ms48000ca741813nh31hl623/sesowasiboriso.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160837a8d5befb---77042791205.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/94445588875.pdfPDF link annotation
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c6592438ecb---levidazozeroj.pdfIn PDF document text
    • http://svingenieria.cl/userfiles/file/dideziwixafoguro.pdfIn PDF document text
    • http://micronforgacsolo.hu/UserFiles/file/88229138664.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5f41dbc0e---42284595074.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/nabanilonamufikonib.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b71877ffcb---79976155390.pdfIn PDF document text
    • http://anjilh.com/uploadfile/file///2021050218184289.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2496862650---zowizukafinatakezutis.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/eolb6vn8gogvrttrj4dmse8877/26434245140.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/bofaxojafovifavirawiwumik.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/cd59f23b8f67d254bef4bf8933e8caed/banifexobe.pdfIn PDF document text
    • https://www.elitelawnsolutions.co.uk/wp-content/plugins/super-forms/uploads/php/files/12i652jekrffb5101vllai2p0o/dogusowoketomoxolubun.pdfIn PDF document text
    • http://househouse.it/userfiles/files/fuvitijixaguxew.pdfIn PDF document text
    • http://execdentalclinic.com/uploads/ckfinder/userfiles/files/48230277848.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160795c6342698---firozejutezume.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5374af3861---peduwagabigakegidu.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/sonipijidoz.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac9893e25f0---47919251090.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=percy+jackson+fanfiction+reading+the+books+sent+back+in+time+completePDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/70d1701e539da46ccfad37446e9ce481/dinolubusa.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010bf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF9 20664 bytes
SHA-256: 8ef92fa8304f85d9e69ed1f19e5da44d04dd2a6d50f4ea11ea14807820938381
font_01_sfnt_off000140ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000158d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158D1 11544 bytes
SHA-256: cc82322e57f430944e9e3595b5b2dc2a8cabc13aa189717ea557fc5511c63650

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