Malicious PDF — malware analysis report

Static analysis result for SHA-256 0988eeae313eade1…

MALICIOUS

PDF

79.7 KB Created: 2021-05-26 03:23:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0e215a54ac0d89666c28d351ce7028e SHA-1: db7d5bd139f0285b6e256e76ee86c925949409e2 SHA-256: 0988eeae313eade170cd9fe02d47841f4e78308fe6db5cc5ce0da566790b0753
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to compromised WordPress sites, likely intended to distribute malware disguised as a cracked application. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs suggest a phishing or malware distribution vector.

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://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/ec95fcab79f49aa00c37a8f5855647c5/zewusomadope.pdf
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081b18b0e0de---18318100483.pdf
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4611c331d---78875240065.pdf
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/meuksko6qdnn8m180l188ulmcv/53697726066.pdf
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16099b4bba69e8---70766085456.pdf
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5b794f665---rufanilalup.pdf
    • https://daleel.global/wp-content/plugins/super-forms/uploads/php/files/v2dfuoml69rofl5hoklusdbebg/89587030418.pdf
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d69e5f40316928a6875da84dc69e6e55/gakufojamiwuzunilanidi.pdf
    • http://pospatrans.cz/UserFiles/File/24957896048.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/0ckhj86fe45jsooifmpib96c93/bobemotozosev.pdf
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a773700440---40852057909.pdf
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/28c53b484a294f602cc67248a6448048/telowasuwijovoduwapa.pdf
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/4d180772df33e6dff5628e1b1b4266fc/lajeterofitaduze.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=action+launcher+cracked+apk
    • 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://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db1f.bin
364e752750124d5505190efaaa9a0eae79acd344a2094a8b102e3d52644b98a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB1F 5036 bytes
font_01_sfnt_off0000ec30.bin
6d2a3a16cc464ce72cf05976c7f96a31c93af2202e0dc760c37a694345e222ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC30 1800 bytes
font_02_sfnt_off0000f4c0.bin
fe9a6163fad79a0ba685379846035410c4aed5555536c41f169d6ed304e31d58		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C0 10992 bytes
font_03_sfnt_off00011a7c.bin
2c5f1a2e3d9f683f6a217a47aeaaae813f7d4ef732a5ff54a929695507d09140		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A7C 16092 bytes

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