Malicious PDF — malware analysis report

Static analysis result for SHA-256 b17f9e66f6234ec7…

MALICIOUS

PDF

105.1 KB Created: 2021-06-20 10:16:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b7fe96137c78489aff9bfd78925bcbdd SHA-1: c8d2cec044c0eaf1e7f290f1333f8513694e0c10 SHA-256: b17f9e66f6234ec7190fede2db4321e3547023cda8ddde4ce3679fa758d52e5b
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. ClamAV detection and ML classification strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with attempts to exploit users via malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/hekqgmacg8n42tg2s6ub4b2jia/makowozibimonuvorikola.pdf In PDF document text
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/mlmt1fospbspduh306i783kumm/68064655270.pdfIn PDF document text
    • http://safeabortionnepal.com/userfiles/file/gosojalumabalabogef.pdfIn PDF document text
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/h9qv0sfe31umcajpiufu86cep6/34060827302.pdfIn PDF document text
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/cdn3825bpue3i1s708q2gdlt3c/tipebozafi.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/q3vgvljmuro7bspi0sm5ng29un/46202991360.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c73eb23d035---68761793831.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/bceh1ats48f65g31mvoivnoqbg/63267939645.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/14fac9a38619f4cf5df7cc57710d24ff/26312260942.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607f56e88a1f5---64325894770.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/5653359c1516b9f621b24bf5fa059518/gufugosatobifenerabifod.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160777311c5403---lenixililulemoxozaki.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/q0gb3i74n08qhkjsa2sj92sab7/5638687506.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ffb450b79c---22247905573.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160778ae05a8a1---bogos.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=palli+vilum+panjangamPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00012349.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12349 25408 bytes
SHA-256: 5503285aa63a40a0a9f00caba1dba1596d2ba0d543a9deb37dccb39bb5f6972b
font_00_sfnt_off000113de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113DE 4576 bytes
SHA-256: dd9d79134f994a65126899c59dc1a8a8c96706b1f5d4d7e88c60dcfbe9647453
font_02_sfnt_off0001567e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1567E 10564 bytes
SHA-256: b863053fb485c25a92dc5ffbccbb9126fafa6e6389aadc70613cb81c2db46821
font_03_sfnt_off00017a34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A34 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
font_04_sfnt_off00018834.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18834 3604 bytes
SHA-256: 9b75a70464dba9ad57e19146f2993031c287831024b8f648107e153f03270d74

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