Malicious PDF — malware analysis report

Static analysis result for SHA-256 93513c7f31caa882…

MALICIOUS

PDF

72.0 KB Created: 2020-11-18 05:54:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 67a4593f84ae74d9e46b0434dd3fead6 SHA-1: b155594dc148ebbe4538def1dd58f6f325f57c1f SHA-256: 93513c7f31caa8823bc303427249eb9b7c9921b7949270327e7bc36da95c24db
156 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. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://trafffi.ru/123?utm_term=domino+theory+of+accident+causation+pdf PDF link annotation
    • https://laputamobo.weebly.com/uploads/1/3/4/7/134763437/772798d38fa.pdfIn PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/47db93d7b.pdfIn PDF document text
    • https://gaxopekel.weebly.com/uploads/1/3/0/9/130969853/mufozujiv.pdfIn PDF document text
    • https://zafitageleg.weebly.com/uploads/1/3/4/4/134489703/wetuxaxewajuludodosu.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/a2c789ea-1763-4469-9e7e-9da31fcc3a9a/osrs_low_level_lava_dragon_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3e10e7f-504b-4fd0-93c7-efab42f227f8/freshman_survival_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fa6c6b1-a039-449b-b7f7-39bb4975e64d/phantom_forces_l86_lsw_best_setup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15f37202-935a-4742-8c92-816b92ae1bf8/driving_theory_test_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dcb00a4-e5eb-4fc0-a0ac-c380b4a5feeb/4122648615.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbd3cad3-9354-417b-8ac1-42f8e9aa1028/37756927039.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/592a3b09-5d4d-4613-82f8-2a7080ea27e0/bionic_turtle_frm.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/56249856064.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 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD362 5464 bytes
SHA-256: ae7b7f88c91ceff84907cb03f9c62f9c40fc27c9292585fd671fe55c58deeb4e
font_01_sfnt_off0000e5d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D5 1688 bytes
SHA-256: 9d2b638c5dd3cd3f7096e9cc6f94348a381c44cbe5b9997df3af4c9865379b90
font_02_sfnt_off0000ee42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE42 10732 bytes
SHA-256: 447aa36acbb1702a0900f9cf400e5cb3bd1243fde9b88864d5fcbdf49502ef92

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