Malicious PDF — malware analysis report

Static analysis result for SHA-256 1edad0635bb64511…

MALICIOUS

PDF

77.5 KB Created: 2021-03-24 17:45:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f4095877e6608a0f6f2cb16e6450df41 SHA-1: 8f094088b0f20b99f0565340881293c61c257be8 SHA-256: 1edad0635bb6451146e1f04091ee8328426db5e9096c2369d2534961ddfd1bcc
206 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which are hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites or download further payloads. The document body, though truncated and obfuscated, contains keywords related to a product price, suggesting a lure for a scam or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://golowaki.ru/strik?utm_term=snap+on+solus+pro+scanner+price PDF link annotation
    • https://cdn.sqhk.co/gediwuwanol/hiQeihq/lebunijok.pdfIn PDF document text
    • https://cdn.sqhk.co/waxobakal/piea1hd/17888204393.pdfIn PDF document text
    • https://cdn.sqhk.co/nifijagik/Shhj6Py/endless_boss_fight_mod_apk.pdfIn PDF document text
    • http://gemajelibetojup.scienceontheweb.net/gabion_wall_construction.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://113c517c-d7b0-4b36-99d7-6722bcb7ef36.filesusr.com/ugd/8e66a5_7aa101abd96047918aa3c27a74efb119.pdf?index=trueIn PDF document text
    • https://4dd4a32c-aced-41d2-87e6-7ff9ca8080d7.filesusr.com/ugd/6d6f33_09077d8913c44ab58cb45714eaf4d4f4.pdf?index=trueIn PDF document text
    • https://b133b025-67d1-4190-9e53-fbb99503dec2.filesusr.com/ugd/caf13f_f55289eabeef4ff4a7f0a4f4a04f1a6d.pdf?index=trueIn PDF document text
    • http://forojiwimudobo.atwebpages.com/1952_play_by_samuel_beckett.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/wildgame_innovations_quick_set_feeder_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/36569977240.pdfIn PDF document text
    • https://f84ffea9-2755-49c2-9cb5-47ca8b55fe65.filesusr.com/ugd/0adedf_79bb3051cb3b4410b4ac0a5fc4c71ad4.pdf?index=trueIn PDF document text
    • https://fb79ad55-22b5-4823-9538-35c71bbbd514.filesusr.com/ugd/ea423f_a742bd5be81648f6991659e8f2572e49.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3459535-ca4f-44fb-b6ce-ee0e4c7285d2/bunibamuximojijubepi.pdfIn PDF document text
    • https://3745348a-78a0-42d7-8ff4-af2b45bf5faf.filesusr.com/ugd/02631b_6286bdd854f8426ca3db4e9f203e2378.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbf0291d-a0f1-4489-8365-91b64ae490ce/vojakatibaxera.pdfIn PDF document text
    • https://5e0c4d4d-41f9-428c-9564-b93e7cff6769.filesusr.com/ugd/510691_d6c180351e27450e8d5e71554eadf17e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/juwipofodawavubewizow.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/active_directory_administrator_interview_questions_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e78e923-36b1-41df-90f4-f590bc9b8aca/contour_next_ez_test_strips_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bcc0f5a-db64-4dae-809f-834ffe02d002/61836568939.pdfIn PDF document text
    • https://dc6b22d1-fd3c-476a-b8f1-b0505981f591.filesusr.com/ugd/ab5adf_b5ce3f93f60c4ba1a7d35c30e470f4dd.pdf?index=trueIn 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_off0000ee48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE48 5032 bytes
SHA-256: fd4487468d34711cd010c90f5a0b9908a3371c269b673cdce956e3e9c273cbce
font_01_sfnt_off0000ff71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF71 11864 bytes
SHA-256: ef458cfb8c56c0d1756d8f55ba3097086f2044b26e9b2bb140b6ca648bba7248