Malicious PDF — malware analysis report

Static analysis result for SHA-256 a35e8bb8176ccf27…

MALICIOUS

PDF

75.7 KB Created: 2020-12-06 05:14:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 874a30eb5b6fa48a52cd7db89d9c02ef SHA-1: dbba50aca243818f34220b5187ef6782303ba9a7 SHA-256: a35e8bb8176ccf2772367ec6411963949379c4896998c934bab45c05df8a6692
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://trafficel.ru/strik?utm_term=2008+ford+f350+for+sale PDF link annotation
    • https://mezuxanivatanid.weebly.com/uploads/1/3/4/4/134499991/mesudawume.pdfIn PDF document text
    • https://dagojamigim.weebly.com/uploads/1/3/4/7/134763314/8414416.pdfIn PDF document text
    • https://bituxusod.weebly.com/uploads/1/3/4/3/134347303/e9ac8638.pdfIn PDF document text
    • https://jutivodip.weebly.com/uploads/1/3/4/4/134489611/2e184.pdfIn PDF document text
    • https://wuzajamepoxomis.weebly.com/uploads/1/3/4/0/134096323/a94a45afb2.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/5a9f3de9-540f-4a71-9e76-76c7e5bd0a44/sitoximijopija.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/zemerirapakosenogiwawipod.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e2fd6b97992eb55c026f/t/5fc12a3ae18c5c478e25c5fc/1606494780668/mazixavuku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c1ef41c-128c-4a7c-a7e7-9ef5a0a2bc89/6769536570.pdfIn PDF document text
    • https://s3.amazonaws.com/jozaponi/45376980169.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a22ae8f-316d-4b0e-9096-8752badb8329/tofogidokokododenusonovo.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/mariage_d_amour_piano.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc294961452f90b7fefeff3/t/5fc37e724f983757204cb9e5/1606647413788/rajemisonamikidekowuviga.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/30957194980.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B3 5564 bytes
SHA-256: 9cb0fbb3a18b51274a248ce8618c3244e5e864c2a38871668f44fb7a334416f8
font_01_sfnt_off0000fcb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB4 11088 bytes
SHA-256: 2e6d818cff080d685f47d1ab0946547a561ed9e7a83ac1b6d2e0c4e03f87d5b0

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