Malicious PDF — malware analysis report

Static analysis result for SHA-256 147e9f2f4bec2668…

MALICIOUS

PDF

131.1 KB Created: 2021-06-15 16:21:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: f6a8634be8094bf0d921d8847898aa11 SHA-1: 1eb2231024afa77993b49bfda9e8b15964a3763c SHA-256: 147e9f2f4bec2668f5e4675da7193a44f4b3456c8b552d3e687e30487d5070d9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm for SEO manipulation or phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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://pixomot.ru/uplcv?utm_term=glencoe+algebra+2+chapter+4+test+answer+key PDF link annotation
    • https://alakharia.com/public_html/userfiles/file/6819096976.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/0e890912283e760e84f12d04b594b910/34553554506.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/aa91641ab0d6dab1e8e2cdcfe01fc7d9/fegumul.pdfIn PDF document text
    • http://imailbox.nl/images/uploadedimages/file/junamefumawuxagepif.pdfIn PDF document text
    • http://jagodkaprzedszkole.pl/userfiles/file/44402816532.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/euvo08s4q1qcd92rehf5840pgl/webujabujuxuxolux.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/4da91092cb0b6651aa2391e227102698/robabegegex.pdfIn PDF document text
    • https://ksuskalology.com/images/file/golasajafamoja.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/nr9p64uahjdebu0dmmpn8tvs2p/84409689872.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/15320585875.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16099ea496b885---dawakagefasezafevi.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/pevosegur.pdfIn PDF document text
    • http://aweibel.com/Photo/file/29618454235.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b99ec78ad5a---jopamisesirerowukajoruk.pdfIn PDF document text
    • http://www.mezmat.ru/ckfinder/userfiles/files/bopojanodamedu.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b10dbc56fa---puzumupaxixaverasovuzut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000195c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x195C5 5748 bytes
SHA-256: 8723d9ff2776aca598a2fb6d7992f41e7daf85146b435f5a09c5b3e701e565e3
font_01_sfnt_off0001a983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A983 5844 bytes
SHA-256: b22090a7f01784d72f772e2e55251ce695f0a03957c84fb00abdf4e0704266fb
font_02_sfnt_off0001bd86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BD86 13432 bytes
SHA-256: d8d6e593ebf48eabf117fc4f572b9b57ac9862a78ebfa875025356ee3173f17e
font_03_sfnt_off0001e9b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E9B8 16088 bytes
SHA-256: 3c1c7bd747a9a8f6e1c531457064e9378d9a893e5271ac7381d9d0015290d8f4

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