Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7348c086a94da95…

MALICIOUS

PDF

85.0 KB Created: 2021-08-22 00:55:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 30f8e34db917211f244c64b99a019da4 SHA-1: 2204e945915535d49ffcfa8053e7ba07d44cd2ec SHA-256: c7348c086a94da95e6ba5e05926be8eda53ae9ad79fbc88ca4fc6b31a5fb3667
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were directly extracted, the PDF structure and URL patterns are indicative of malicious redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 http://steinemann-ag.ru/38702610236.pdf In PDF document text
    • http://www.seminariomenorvalencia.com/admin/lib/ckfinder/userfiles/files/kagatafovasudezoxo.pdfIn PDF document text
    • http://emblem4home.com/UserFiles/Member/File/27178343883.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607763ee9be17---gerolaradelu.pdfIn PDF document text
    • http://safiorida.nl/operatori/userfiles/file/safibedofinuwipiridonelus.pdfIn PDF document text
    • http://divodizain.ru/ckfinder/userfiles/files/varopeguzoku.pdfIn PDF document text
    • http://benetworkingpro.com/ckfinder/userfiles/files/31458267282.pdfIn PDF document text
    • http://kevinmcallisterlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fokiguzazew.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160c2c2882742c---74327306343.pdfIn PDF document text
    • http://teamwork-poetschke.com/ckfinder/userfiles/files/tabax.pdfIn PDF document text
    • http://perles-del-beya.com/userfiles/file/repasoladulinelak.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/01e46db2d1069dab8a617cf538578d7c/40341768593.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/cfb51914608e8e07694c8022f90fa777/59008387092.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/4glvt8giqsu74i6m7cpnu6bkrk/6013050040.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608c0f27681bf---kitetawofiwaratakik.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/7aidkunvkb4st2p4mf08fchcmg/39845421219.pdfIn PDF document text
    • http://plnjl.com/userfiles/files/73196674787.pdfIn PDF document text
    • http://kleiberit.ru/files/file/82920350937.pdfIn PDF document text
    • http://jingyilin.org/uploads/file/28660824873.pdfIn PDF document text
    • http://thinhhoanggia.vn/Images_upload/files/jomaxireg.pdfIn PDF document text
    • http://synphabase.ch/upload/file/vuzititomakopanibapoli.pdfIn PDF document text
    • http://daotaonhaccong.com/uploads/userfiles/file/65807984166.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=orgullo+y+prejuicio+1995+pelicula+completa+en+espa%C3%B1ol+latinoPDF link annotation
    • http://perfecturology.cafe24.com/upload/editor/imagefile/bitavupikivuketipezujitik.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC3A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f44c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF44C 20068 bytes
SHA-256: d650cfac7653e4068f63fad880ac4c2d35bc4f225a7b37b23c1856b7a199f95c
font_02_sfnt_off00012714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12714 11644 bytes
SHA-256: 69b474bb809358493d39c47d8cac7d4d7133da275eaddf777cbb056f0af7ee34

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