Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6a7aceb01bea64c…

MALICIOUS

PDF

64.0 KB Created: 2021-05-15 15:12:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a36e04d6e380f1135384c45e44f4d580 SHA-1: 4eba81c029e4f7d348c3406c766ee32b7110a27e SHA-256: e6a7aceb01bea64cff9ee14f9f6fa7651a5d0d814fceea969a05483150d1fa0a
154 Risk Score

Malware Insights

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

The PDF document uses a lure related to 'Batman Arkham Knight' to disguise its malicious intent. It contains numerous embedded URLs, many of which point to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or a trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8355

Heuristics 5

  • 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
  • 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://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160707e62b29de---gumakoxopakifa.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/sdups10vhdh06a9k3h730kt090/40142934434.pdf
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/29a9fc1fe420475e96d4c1a215237c5c/66797246403.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/sq00pn9gopt8a1qgo47acsup0k/sarow.pdf
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/e791c3bc4584ab6e099a86022907bb23/58687355764.pdf
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606e2ace79360---nezinaxiwo.pdf
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/ecmm6qp9sovj7mieqrr35qtkvd/94150354713.pdf
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/4f1290fd64a4d10c7989af4d9f6bb0f7/pipitaxadaxunasukumonef.pdf
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/48f8a6e0c7f8e0deed13e243c5809ee5/nuweti.pdf
    • http://jar-ted.pl/file/waxedamotoluviruwepi.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078f38529a23---lagijogison.pdf
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/sdsbla57fb40fdbbhbm6l95if0/89299866913.pdf
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077bb3163a63---dimuxujubevolir.pdf
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/cc0925dc1a0ba0d0785503d2ca38d2a6/56279209926.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=batman+arkham+knight+official+guide+pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d182.bin
ba08f89b9d72cc52d57607598dc5512b07eac35fdc25368e086335bfb777dbfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD182 5504 bytes
font_01_sfnt_off0000e414.bin
fdbea186df5d4c77cf63f5a8238b34fd8a764f50abcd1980ea1ffa26d694b788		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE414 9484 bytes

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