Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a4239070e29ce1b…

MALICIOUS

PDF

73.1 KB Created: 2021-04-06 12:44:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: abd9ecf8c867217654cb5ba5bf1fe4ac SHA-1: 7897047c8425fe2bfee9da078e892025c0353736 SHA-256: 2a4239070e29ce1b93ea92ba8f57230e9ef326f3bae2b18cfb5f92ce7647cecf
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external URLs, many of which are hosted on disposable domains, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the structure of the PDF point towards an attempt to redirect users to potentially harmful content.

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://bologen.ru/award?keyword=speed+control+of+dc+shunt+motor+theory+pdf PDF link annotation
    • http://nutusugeralinet.mypressonline.com/annovi_reverberi_pump_parts_canada.pdfIn PDF document text
    • https://cdn.sqhk.co/xidizizo/KhdjiYz/ryanair_app_for_laptop.pdfIn PDF document text
    • https://vefonero.weebly.com/uploads/1/3/1/0/131070196/3585939.pdfIn PDF document text
    • https://fufijejelido.weebly.com/uploads/1/3/4/3/134351462/33a79ed333ef9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487897/normal_60516a182d686.pdfIn PDF document text
    • https://cdn.sqhk.co/xikokopek/fPdhiWX/tenuku.pdfIn PDF document text
    • https://xotufidew.weebly.com/uploads/1/3/1/8/131856134/detof.pdfIn PDF document text
    • https://cdn.sqhk.co/xolilipedeko/jbhbigq/fujadepokagovivuna.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413244/normal_5fcea346c14cb.pdfIn PDF document text
    • https://cdn.sqhk.co/tavanaru/yhahaDm/life_after_death_quotes_hinduism.pdfIn PDF document text
    • https://ranalugepileli.weebly.com/uploads/1/3/4/7/134735155/luzefu_lowot_lorijerebe_jumizazixodu.pdfIn PDF document text
    • http://pasikufopubiwo.mypressonline.com/vifaforowipemitavaniki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372980/normal_6048c46b63029.pdfIn PDF document text
    • https://cdn.sqhk.co/josozudibud/hfdiihi/ziwowe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408172/normal_5fe26229d4075.pdfIn PDF document text
    • http://sakulog.sportsontheweb.net/vifexalusomegezobugume.pdfIn PDF document text
    • https://cdn.sqhk.co/dusaradezat/eX4idif/pottery_pots_login.pdfIn PDF document text
    • https://faruroju.weebly.com/uploads/1/3/5/9/135986438/vafixup_karifojegebefu_wivevuwo.pdfIn PDF document text
    • http://ketoxitigojaluk.sportsontheweb.net/behaviorismo_radical_livro.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://salajire.onlinewebshop.net/gebesaxefulojepivel.pdfIn PDF document text
    • http://xasagode.myartsonline.com/80432465621.pdfIn PDF document text
    • http://gafodix.myartsonline.com/genetics_books_free_download.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE169 5392 bytes
SHA-256: 7c0c7037ae95b0bc77d029558bd332864f54ae6c032d07248dd6d7ab9135fc2e
font_01_sfnt_off0000f3a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A4 10384 bytes
SHA-256: 84c91a9a75f73c9f4ba81be4dbf16950e05c985ce4958e136c9370467e32f708