Malicious PDF — malware analysis report

Static analysis result for SHA-256 e082c96412ada0e7…

MALICIOUS

PDF

93.2 KB Created: 2021-03-28 16:33:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 6c1b7fa8561ca86a14b9dbc3b62876d4 SHA-1: 04443a1929b5c7fb6aaca663aa042f70a4259b3c SHA-256: e082c96412ada0e7911843cd5a7dbd22248ef300b7615075a755d569e6b8c08c
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/award?keyword=mesotelioma+epitelioide+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4456660/normal_6013f512d5ff5.pdfIn PDF document text
    • https://nabisafuv.weebly.com/uploads/1/3/1/4/131413222/mitilel_mafasitojonan.pdfIn PDF document text
    • https://tesekagaz.weebly.com/uploads/1/3/4/3/134342497/aca96ede.pdfIn PDF document text
    • https://goponubinolofuv.weebly.com/uploads/1/3/4/6/134695307/8399610.pdfIn PDF document text
    • http://waferaboteb.mypressonline.com/jatiwutunujekivuvi.pdfIn PDF document text
    • https://pukakanasosakum.weebly.com/uploads/1/3/5/3/135392678/9616261.pdfIn PDF document text
    • https://zunexoxefa.weebly.com/uploads/1/3/5/3/135340588/7312647.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463308/normal_5ff87381730c7.pdfIn PDF document text
    • http://neridofufuleteg.scienceontheweb.net/bagagexesilogename.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393521/normal_5ff226a716e82.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385647/normal_6005c2b80430e.pdfIn PDF document text
    • http://sallely.xyz/sajowilopaveliluzufahgoie.pdfIn PDF document text
    • http://reactivascotia2020.com/how_to_get_rid_of_a_huge_cystic_pimple_overnight01j45.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mubodadekutaxim.atwebpages.com/vce_general_maths_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/komefoku.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/beaver_builder_header_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/magnetism_worksheet_for_5th_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e48754d-a60c-41e6-b381-6f3f9e23fd86/scansnap_s1500_driver_for_macos_catalina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a0951ac-793e-45db-8022-2b5ee8d4ad4f/fuvuvovaverojevuxotalape.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/puseveni.pdfIn PDF document text
    • http://kakasis.onlinewebshop.net/65950101609.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_off00012ea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EA8 5096 bytes
SHA-256: e89c6d8f9cb0fee03f803d57d97ab15c4ea89d6743a32603f38f72bda3900c43
font_01_sfnt_off00013ff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FF9 11696 bytes
SHA-256: 950b393e9b1e4be4d01d969eefb37e0c8a5ce2c6e658bd3ad1fa6cbcc7c962e7