Malicious PDF — malware analysis report

Static analysis result for SHA-256 7531f7003ed8a1dd…

MALICIOUS

PDF

69.1 KB Created: 2020-11-12 17:45:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 33c32a50e05012d34fac312130b8cede SHA-1: 178560879a252a3ee1d804f6d9d1660ddabbf3ed SHA-256: 7531f7003ed8a1dded8072a02e36f4086c1ca39d8c1fbcd315195c9d3cee4353
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, with one pointing to a suspicious domain ('trafftec.ru') that is likely part of a link farm or phishing operation. While no scripts were explicitly extracted, the PDF structure and the presence of external links suggest an attempt to redirect the user to malicious content, potentially for phishing or malware distribution.

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://trafftec.ru/strik?utm_term=contenidos+conceptuales+procedimenta PDF link annotation
    • https://meverofukibax.weebly.com/uploads/1/3/4/6/134620555/jexit.pdfIn PDF document text
    • https://xisubuto.weebly.com/uploads/1/3/1/3/131380177/2864beb0d30153.pdfIn PDF document text
    • https://legopojuze.weebly.com/uploads/1/3/4/3/134369078/7904438.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://s3.amazonaws.com/levovod/76050197590.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cfdc291-5c40-4cbc-a2d1-dd75f9f6bae3/partes_del_periodico_wikipedia.pdfIn PDF document text
    • https://s3.amazonaws.com/fenatagazise/lafenozozaju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54f18e59-7edf-4bfe-873e-980faa5aee35/willow_canyon_wildcats_logo.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/zhongwu_guo_rate_my_professor.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/chizuru_minamoto_wiki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41eb5340-a4af-4ef5-93c3-54fd2688e1fc/96137032301.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8945b44a-8a1c-48aa-a8fe-6826b37e1cc0/zanusugevitudiduga.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/ruvafaron.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/54057884180.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/gosubadejunamegidowir.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_off0000c3e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3E3 5124 bytes
SHA-256: 17e8c528e3a769de23a4e4bd112bb56e1661e6cf271394f2985a66518097d61c
font_01_sfnt_off0000d535.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD535 10596 bytes
SHA-256: 92f1210c3c12b5072ad4ebc504a457e46e2ab0d7dc1d628593734989caa451f9
font_02_sfnt_off0000f7cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7CC 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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