Malicious PDF — malware analysis report

Static analysis result for SHA-256 110a533dba365c89…

MALICIOUS

PDF

63.7 KB Created: 2020-12-20 18:40:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: be60a72e0e3502eef3621680d7867169 SHA-1: 77a2bddc6bc271c68c2fbae900dc6aa35883a24c SHA-256: 110a533dba365c89a61c197e1f9d1eed730e17d46b9f214f2fc793dfa8ee2c81
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, with the primary malicious URL being traffset.ru. This suggests an attempt to direct users to potentially malicious or phishing content. While no scripts were directly extracted, the PDF structure and heuristic firings indicate malicious intent, likely related to phishing or SEO abuse.

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/strik?utm_term=sit+and+spin+toy+playskool PDF link annotation
    • https://jolibudowuw.weebly.com/uploads/1/3/4/5/134596284/varevoxaji-jiduxupogax-sevurugoj-vabefimodepimu.pdfIn PDF document text
    • https://vajoribenokajug.weebly.com/uploads/1/3/4/7/134713142/6936877.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449627/normal_5fd68e3f63db2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467300/normal_5fb540b37b2f9.pdfIn PDF document text
    • https://wedutigumufezeb.weebly.com/uploads/1/3/4/6/134659425/kagesidegapo_fabofa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367920/normal_5f9700ea4b99f.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/87950d21-3388-4f64-8baa-0d35a6d6ce7d/43187561431.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cad5fad-ff17-48ee-9aac-09d91658378c/ankle_bracelet_meaning_urban_dictionary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ee42ba4-36d3-413e-ae72-52ac1d8da9fe/54744976703.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94644850-5d89-4516-b3b4-075c31e79361/perspective_made_easy_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c2b163a-39a5-4857-9961-e35616bbfcb8/64742336455.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_off0000bbae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBAE 5124 bytes
SHA-256: 224f2d9bd53cb5e97807b83d3d854218a4fabd914b45e7e20a0836f3c5a1fad1
font_01_sfnt_off0000cd39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD39 10876 bytes
SHA-256: c95e334ccf1b959ac62592fabbc403928eda6ada95c6e5e34ecd091840be2eeb

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