Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a81afee14f136b7…

MALICIOUS

PDF

66.6 KB Created: 2020-12-13 22:24:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4fd7402b2db32f859c32f0103bc2a1c8 SHA-1: d81419f19d84b91c03d0f76b8d79bcded1fc7e68 SHA-256: 9a81afee14f136b7df7e609527ab13e756994c315aa04bd58b5f7099a5ab9170
116 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 embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://trafftec.ru/123?utm_term=exponents+and+exponential+functions+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366343/normal_5fd61d77e1ee0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9072eb98-1191-4485-8b93-d75ee9c4077f/3843071095.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84ed330c-2c32-4f84-8cea-beaf0c393df2/77797356169.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa70c6cf-2454-4c4c-95be-0c201f1d4d28/tipo_de_grupos_juveniles.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc385e368612547ed6e891e/t/5fcb0be01ef6d1662fe82949/1607142368516/xaxobetapad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f71f950-907b-4da3-b8ec-a2f7d405d16a/paxinajipa.pdfIn PDF document text
    • https://s3.amazonaws.com/mewezekilafef/55250828112.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f8e47af-add4-45b3-8053-4397b8431693/tenoli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0dab6b2-5abe-471b-8268-6b843c80b4af/73791557665.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/kiketilibolog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99a109d5-4e70-4d89-8000-46e815f9638b/vovafilutokujataf.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

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6DB 5268 bytes
SHA-256: b95bc11bb01af6f06a80a6ff50202f8cb6c38f83fe61cecff8a93aefc6ad309d
font_01_sfnt_off0000d8ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8EC 10780 bytes
SHA-256: 92974a5fb1b350adc7b5b0285046663d896e5e57519a90f7d0f6e90c89968906

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