Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccc48fbbfec26b6b…

MALICIOUS

PDF

72.9 KB Created: 2020-12-22 21:51:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: eb1b813f80f2116edcf8fa6bab3b971f SHA-1: 95f5cc483a1ffc005947639ef2e44580308ee0fd SHA-256: ccc48fbbfec26b6b766b7df4c20369563dc299d94e6d60e951c67cc5a12c759c
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 0.9998

Heuristics 5

  • 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.
  • 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://trafffe.ru/123?utm_term=el+libro+de+la+vida+movie PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4479925/normal_5fda83d7c0d99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413862/normal_5fa5880acac0e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403681/normal_5fc93d1a9fc52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393883/normal_5f8f880fdd7c8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384142/normal_5fcd2f9748383.pdfIn PDF document text
    • https://siwusoxol.weebly.com/uploads/1/3/4/5/134584737/vegobavadixat-gezabepakadizix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372076/normal_5f8c274dabaaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384483/normal_5f989a7ebf20d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386336/normal_5f98d55e45c1e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/02c9871f-dd6c-48b8-8754-9ed724a03920/britax_marathon_70_g3_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93350229-9e83-48e4-af55-48ef506275d4/watch_bride_and_prejudice_online_fre.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7aea9ba-bbd7-4dd3-b3f9-58e396b44ad9/wave_characteristics_html5_crossword_puzzle_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/996d27dd-7807-4d3c-b026-35172e614d37/zofepizunile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27b05fa0-4e28-479e-8336-c1ba74aa3904/english_study_guide_for_ged.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17c13f8b-4cb4-4899-b14a-4b1158cb19b8/69778166755.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD356 4552 bytes
SHA-256: 43838239a38a3f78e11b7228d227010e3918b8dafc1aaf289799de526b9386b8
font_01_sfnt_off0000e2c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C0 11004 bytes
SHA-256: 4193fadce918d4f01432a2d0c82658c4f3a04ac57f1eddd107603c19454cfdad
font_02_sfnt_off000106d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D6 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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