Malicious PDF — malware analysis report

Static analysis result for SHA-256 265fce2e208cf7b7…

MALICIOUS

PDF

73.3 KB Created: 2021-06-25 12:44:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 236dfb9518d45c5a6d7b1e6a8ec89ca3 SHA-1: 2837cac052ab51c48398b6aa8ca80107fc1cc4e7 SHA-256: 265fce2e208cf7b79f4ef699559c28e96e4cce2c72d37e89c7a833a8f2a6d2bd
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting a phishing or malware distribution attempt. The heuristic firings indicate a high likelihood of malicious intent, with ClamAV detecting it as Pdf.Phishing.Trojan. The presence of embedded URLs and the nature of the linked content strongly suggest the document is designed to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160796f408b4f2---8752204206.pdf
    • http://lycee-elm.org/userfiles/file/44595952101.pdf
    • http://w-f-l.de/user_img/file/33939243299.pdf
    • http://www.anieliasfx.com/uploads/textareas/file/55749071917.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/hmau128elfj4be2d06pkb9t8v4/13611425539.pdf
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/22se1gs5d38qm9ci63i6ghpobj/7268978901.pdf
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/23e58fd6ea6b9535b2295177f7d13e1d/48596273193.pdf
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9a5ba89dc---99323609983.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609298aeeabfe---jomexizigirivudidap.pdf
    • http://tykhestudiodesigns.com/clients/7/73/7311521ca682816632878891c231d107/File/9859310320.pdf
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/19b98393de25fdbca272d5051e6f34dc/ginajiwer.pdf
    • http://aranykoronakft.hu/userfiles/file/50430274235.pdf
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/8u27m4v2qtf1h72k68nbm479j0/24002596648.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=jobs+entry+level
    • 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_off0000b7cd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xB7CD 16792 bytes
font_01_sfnt_off0000cfe4.bin
e137aa3725f75570fdfd81ba942055b05af49ad9cc00a7e832b0258440d50115
pdf-font-stream PDF embedded font (sfnt) at offset 0xCFE4 10156 bytes
font_02_sfnt_off0000e6d3.bin
9eb1111588a5658a23456eb6d813689951cbdbf3fd9b3dd41de548d49bbdae5b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D3 22248 bytes