Malicious PDF — malware analysis report

Static analysis result for SHA-256 217a6a670d1ecbb7…

MALICIOUS

PDF

69.2 KB Created: 2020-12-19 07:44:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b489f6ad6ebde4a710d257e6994b132a SHA-1: 0443e26efee57eb5e7be3e318173d6ca11a9d505 SHA-256: 217a6a670d1ecbb74a4b0f58750ab09c0e01c18d8b3c6f794723ed11cb66d2c8
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://traffine.ru/strik?utm_term=nasa+federal+credit+union+visa+reviews PDF link annotation
    • https://zogeliwev.weebly.com/uploads/1/3/4/3/134353139/dab0f76a4f877c9.pdfIn PDF document text
    • https://siwizapetodid.weebly.com/uploads/1/3/4/0/134041585/xediwewulanitibise.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487625/normal_5fa971dea1611.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392210/normal_5fca15a694682.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/ef6c541b-1f43-489d-a0fd-b1574a66d0ea/nico_the_pro_minecraft.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70fcd087-d641-4d9b-9660-b240b8d841ee/5177755566.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44456824-c5d8-4ef0-b8f8-397c0d106b9a/turedekelojanezisunasus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a3de5f6-fe4c-43a5-8c32-57361ed64ebc/17794643470.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce6b7989ef447dc9d63afa/t/5fd0995ea040431536c22fea/1607506270905/multiplayer_domino_games_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65701655-4e00-4fba-a80c-587c3f268542/bathroom_exhaust_fan_motor_for_mobile_home.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71e12ff0-4dbe-45f0-a6b1-51d848428910/target_market_for_candles.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_off0000d1fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1FB 5136 bytes
SHA-256: 10a8b4e70eb51a3ed6cb50ec55baab30e446acbfa9405d2fbc45a3362f2e5766
font_01_sfnt_off0000e39e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE39E 10816 bytes
SHA-256: 5aa51438ae9536bd90033ff8cd0cd04559d432af86ce2dced1322a0f9c68a45c

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