Malicious PDF — malware analysis report

Static analysis result for SHA-256 342fdb8bd0abc99e…

MALICIOUS

PDF

71.4 KB Created: 2020-11-20 17:13:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: bb9e2f6648070d06f32f5720b2d477d2 SHA-1: 92da5985f51fa97174e638249caca3ca5c411571 SHA-256: 342fdb8bd0abc99e1c9f52ab27892e555ffae92a5cbc531f4bc55af6bd8181e3
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://traffking.ru/123?utm_term=frenchton+puppies+for+sale+in+missouri PDF link annotation
    • https://maxifabosogup.weebly.com/uploads/1/3/4/5/134526580/1182724.pdfIn PDF document text
    • https://bijoxopibomer.weebly.com/uploads/1/3/4/3/134325560/2f3a6e.pdfIn PDF document text
    • https://mapipuluzobeb.weebly.com/uploads/1/3/1/3/131398440/fewoxepiduxemus.pdfIn PDF document text
    • https://numazerezawikar.weebly.com/uploads/1/3/4/6/134618887/poxaledaroxofirato.pdfIn PDF document text
    • https://rogefiraf.weebly.com/uploads/1/3/4/5/134581109/30d17.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/6e308625-8990-4567-9004-23f320ab8ef2/tiwipinuwajoleketikarugov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ba3d1e4-d1e6-4301-9737-cd5eceb826ac/90024400089.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88abc265-0db8-44c8-918e-4fb726a98f30/linux_tutorial_tutorialspoint.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a9283ca-41c6-4185-af7a-0f99eb8b6b95/read_impulse_by_ellen_hopkins_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4413e6a6-60f8-40f4-bb61-4ff6b17f469e/wedunexilove.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9b28e2b-140a-4c1e-abeb-0a586bdd1b2a/rezomikekosevitirojanasa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d55adf6f-b629-43e8-9667-041362b9dac0/24346518381.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7aa60a03-0365-40f1-8c7c-f38d128ddcf5/rosemount_middle_school_supply_list.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_off0000cbf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBF8 5092 bytes
SHA-256: 6d94b6e14cc84f5c7ea8c53b0feabbb6ec911f6637e171a2117914f0ec810f11
font_01_sfnt_off0000dd15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD15 10976 bytes
SHA-256: c6d179c4d7d0be659da6826a5a364d372b5b4b3dbdacf74ea2810c2d0b101072
font_02_sfnt_off00010243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10243 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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