Malicious PDF — malware analysis report

Static analysis result for SHA-256 dac6e679b40b5bc5…

MALICIOUS

PDF

73.0 KB Created: 2021-06-19 23:36:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e49ee7e6d4476aeb92006731dc3a9cf7 SHA-1: c2816c1d9c84bfb9160b29eb4fa76af347f9ea62 SHA-256: dac6e679b40b5bc583f0596f33de15de107ec49af7f90f2934e5b85382a03d5b
156 Risk Score

Malware Insights

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

This PDF document is classified as malicious by ML and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to numerous external websites, many of which are hosted on compromised WordPress installations or disposable domains. The document's content, presented as an 'Impact assessment act', is a lure to encourage clicks on these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://teleinwestor.com/userfiles/file/lejememeguv.pdf
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/735255d518129e40d978f0b319653ee1/lurabulavopovodowogogu.pdf
    • https://nhakhoaanphuoc.vn/uploads/files/nuwosifokujaxevuruwonob.pdf
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c72cc60afa4---37934809191.pdf
    • http://xn--szabowski-tub.pl/userfiles/file/66690937137.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a0d4bc4b7---ligavejupaweposozem.pdf
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b0cb79cec64---nebapofagokusafotoze.pdf
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/26048116344.pdf
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/j8q3h827987qjn8e8u1gghogkn/jutamadovo.pdf
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/64d0e9438d012647a5d59c87024dc821/22957641266.pdf
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/62kv9j12f1ecbpfd6i152f5gi5/dujuropagak.pdf
    • http://inventory-acepipe.com/images/uploads/files/refivudirulesimulafizoge.pdf
    • http://dailygiasi.com/uploads/userfiles/file/birelalivenewolinogofibob.pdf
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/b865cd20969ef78b5e984f87e6352cb8/92801217090.pdf
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/5db87a12998750ceb8f60eca941c70e2/53974116925.pdf
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa82120dde---94157164217.pdf
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160770d46c4283---vegiwe.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088bc89c3a43---47325923953.pdf
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160754ddcec821---bufidefiruvizatefi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=impact+assessment+act
    • 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e325.bin
117434c53188700b0cf3d13b0eb98310acf78ab8ef223fca1549fed953be85b1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE325 4888 bytes
font_01_sfnt_off0000f3af.bin
492c72e9d5643ffeb2a2ca7420be845fe0b61b6079155abf2dbe0243b86a3150
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AF 10532 bytes