Malicious PDF — malware analysis report

Static analysis result for SHA-256 d442aeeb0123af75…

MALICIOUS

PDF

66.4 KB Created: 2020-11-21 00:19:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 118a6b6cb7a03fc8a70811d78573bf33 SHA-1: 75720250348869cb0d37f9db34d81087509d139f SHA-256: d442aeeb0123af752abe972e19b9a2e8be512ec956d19bf911282d6502ca9c33
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to PDFs, suggesting a link farm or SEO poisoning tactic. One prominent URL, 'https://traffset.ru/123?utm_term=unity+change+project+folder+name', is directly embedded and likely serves as a lure for users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffset.ru/123?utm_term=unity+change+project+folder+name PDF link annotation
    • https://piwunosorelid.weebly.com/uploads/1/3/4/5/134590209/2597df6f631a49.pdfIn PDF document text
    • https://pisanofinupu.weebly.com/uploads/1/3/1/4/131437881/kagafataxek.pdfIn PDF document text
    • https://nipaxibovaj.weebly.com/uploads/1/3/1/3/131379211/2881863.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bexolamabad/35739014300.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59823bff-942e-4601-99c6-6aa4cb2ddce3/15853712086.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23ade83c-c4b2-4cc8-8380-5035d0f2f714/simbologia_de_diagramas_ladder.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/417d4255-9ca8-4dad-b567-f4d6a607b70a/58215501022.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f2afe17-a5fa-46ad-9d18-03282f7c6281/14074941219.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/travelling_allowance_form_for_central_government_employees.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da72db13-8d1f-4117-a145-5ce95a957034/35309332686.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aef221a0-9026-42f9-877e-6901c16aea4a/gagovegam.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/52224373891.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_off0000c5f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5F8 5560 bytes
SHA-256: 2ab4f21029ff1fb6c4de5def3528d418aba95b4a2e147f39a9f285606a834ab6
font_01_sfnt_off0000d8cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8CC 10640 bytes
SHA-256: 00883d5f0004f78a71db42195c844861d0c90ba00d6e6b042b912acf36a759fa

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