Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccacf0bcd98a7b37…

MALICIOUS

PDF

119.6 KB Created: 2021-08-21 14:05:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d07f44e9ce7ebc05c09177e38bc9a836 SHA-1: e7909aa65264d856ae46b51ab03dc3203272d55c SHA-256: ccacf0bcd98a7b37c257def271d83e3a5aa266cb7bdd58b4ebf47fa79a5e274f
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable, so the rationale is based on the URL analysis and heuristic findings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://debcopharma.com/userfiles/file/37826706095.pdf
    • http://missinternationalbeauty.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/voxazifemit.pdf
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/16111a153136cd---32324549757.pdf
    • http://diysmart.net/userfiles/file/niduxatorajomopajife.pdf
    • https://alves.bg/ckfinder/userfiles/files/vezomofuweb.pdf
    • https://ludifrance.fr/userfiles/file/56209426181.pdf
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a09322df859---91951679986.pdf
    • http://lideparts.com/userfiles/file/1624393889.pdf
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/fe669712b96998b3822844c70a9d166b/63226105863.pdf
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/lb09t3ea2ivgrfk7b2avbbn01k/23520634113.pdf
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad95618f6ef---pefima.pdf
    • https://okna-kursk.ru/page_edit/_samples/userfiles/files/91979069276.pdf
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/901e2fc05cff0222455b3b28b7ad5eae/jewozina.pdf
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/0ce7fffe8e763e372a580f9a27994835/67076303155.pdf
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/eacb3c874070159c9a95c6971a9cde15/rurukodeporofifezugen.pdf
    • https://marblobathware.com/app/webroot/img/files/fiberowobefara.pdf
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/a9ada84a9763beea79010413c30853ab/50399200731.pdf
    • http://arohitourandtravels.com/userfiles/file/81437764267.pdf
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160bb2bf5cb4b9---suluzodogajitasa.pdf
    • https://monyetmesum.com/contents//files/79911759497.pdf
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/j0p6etm6he955hfbubjjekfchj/639763185.pdf
    • http://bostonmentors.com/userfiles/file/39194109465.pdf
    • https://walnutcreekguide.com/wysiwygfiles/file/232389365.pdf
    • https://devcons.org/uploads/userfiles/files/ribovitik.pdf
    • https://www.dropbox.com
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=axis+and+allies+global+map+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016fe0.bin
9249f0f9c09a0039e27f93a22cd8ce1a3e4b5472be6afb1bd138634f95ab247b
pdf-font-stream PDF embedded font (sfnt) at offset 0x16FE0 18084 bytes
font_01_sfnt_off00019ee7.bin
d32dc1c0d5e05ba4220271e4fb06adf3b63ffc9cebdaec75b8a9043537c91e23
pdf-font-stream PDF embedded font (sfnt) at offset 0x19EE7 10864 bytes
font_02_sfnt_off0001b785.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1B785 16792 bytes