Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc6f938485e216f2…

MALICIOUS

PDF

72.4 KB Created: 2020-12-06 18:32:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 60f6ca6284bc2fda97fa38f9865b6362 SHA-1: 98a2f54f9228b57d9d1164afa138fd6508952eff SHA-256: dc6f938485e216f2a6148c1412e445bdc390eb52cd673137a7aac59de1cbc7cd
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-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://trafficel.ru/123?utm_term=atoms+elements+and+compounds+worksheet+answers PDF link annotation
    • https://zanelonovubut.weebly.com/uploads/1/3/4/3/134315015/93f13f50962.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://uploads.strikinglycdn.com/files/2cbac7f1-5ec9-4471-a718-3d56716af600/audi_q7_houston.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/72998514624.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/471dcb5c-599a-4d4e-bf1b-aa0c13f7031a/55224039338.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/risidupovolepefarunotefuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac057fb6-96d5-495e-8fc3-6023a4fcf751/10856637752.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3533ba76-981a-4d7c-a46f-3ac648142157/dafezuxowi.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/bemon.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/income_guidelines_for_food_stamps_in_pennsylvania.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6029ea38-9045-411c-a78a-72add1372af3/womelonelunujagilobebifo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f045f6a6-c789-4162-8446-8be198ddcfbc/22854881326.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/789a6c58-6763-45bb-87b1-c43c43030b7e/jutajiwidupomanimomiziju.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/raxezugamixijizuzobu.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_off0000cd42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD42 5292 bytes
SHA-256: be34016547c5405d76e399018a32d1af47e9332d832154b2570f04520a461235
font_01_sfnt_off0000df1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF1F 11888 bytes
SHA-256: f4367ea3cb13abead7bb5806f353eda94d1e89bfdbd110834880422368b0da80
font_02_sfnt_off0001065b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1065B 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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