Malicious PDF — malware analysis report

Static analysis result for SHA-256 977f0bc2bfc9933d…

MALICIOUS

PDF

60.2 KB Created: 2020-11-11 18:03:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4235660641fe08b255e5960e4b5987da SHA-1: 91f8e970e8183817be180e31a664c8c3813ad401 SHA-256: 977f0bc2bfc9933d86aaaeedc5bfa9c2b460881d394c61f5e27213ab41ec8d31
174 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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) documents that carry no urgency or charge/dispute escalation.
  • 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://ggtraff.ru/123?utm_term=shuriken+sentai+ninninger+kissasian In PDF document text
    • https://jemajodelevo.weebly.com/uploads/1/3/4/3/134394711/teguwep.pdfIn PDF document text
    • https://depoferi.weebly.com/uploads/1/3/4/4/134445349/0c82fca3db6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383702/normal_5fa3cdaae6cfc.pdfIn PDF document text
    • https://rajerese.weebly.com/uploads/1/3/4/3/134387708/womiwofive_dakesitejotitef_nalijezonukob_sibona.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367925/normal_5f9a1d89d8fe9.pdfIn PDF document text
    • https://limikasideg.weebly.com/uploads/1/3/4/4/134446439/a7623b0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/schumacher_battery_charger_se-5212a_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8902f0cb-cd82-491f-aade-1e844f399657/54652300231.pdfIn PDF document text
    • https://s3.amazonaws.com/vinivuxo/rufogibononuliziteduxudus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f953f52b-329a-4ada-a3b4-3e0f9e457aee/reimage_pc_repair_license_key_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed2d8fa2-ca20-4f8d-9085-86244c2e7dd2/determinantes_e_modificadores_do_sub.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/64314727700.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/words_with_pedis.pdfIn PDF document text
    • https://s3.amazonaws.com/bubisifapagefe/42550250910.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_off0000b16e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB16E 5084 bytes
SHA-256: 54ff1a94593c984b1dfdad032d68f3278aef2f01b5c1f3d2a997306e97e5750e
font_01_sfnt_off0000c2ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2AE 9832 bytes
SHA-256: d6a86a8c06cb40934618279a89540989e1a609a14956dfd348f780a145e09607

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