Malicious PDF — malware analysis report

Static analysis result for SHA-256 d978501a9830b1af…

MALICIOUS

PDF

65.3 KB Created: 2020-11-21 17:23:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: f04c827cccf007cc2e54dc000aae4ebc SHA-1: 6c4c9dec2c83bf54f62771b587f2967c23021080 SHA-256: d978501a9830b1aff70242edb9cf1859e5620aeb5b943dadd7dea2080f076bd6
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external links, with one pointing to 'trafffi.ru', suggesting a link farm or phishing lure. The document body, though heavily obfuscated, contains keywords related to 'sales commission agreement template california', which is likely a pretext to trick users into clicking the malicious links.

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://trafffi.ru/123?utm_term=sales+commission+agreement+template+california PDF link annotation
    • https://zibeselev.weebly.com/uploads/1/3/4/1/134131471/mabazuturej_xafurupitar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415742/normal_5fadacaa3d235.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369797/normal_5f88113033fc2.pdfIn PDF document text
    • https://fomukudir.weebly.com/uploads/1/3/4/4/134403856/visukuso-tudusizuror-guzofulowodot.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/f488d6fc-267b-4fe3-821f-b7b92ab5ac03/nivobi.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/airtel_xstream_android_tv_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd4c4d77-4872-4f67-8517-444200bf92a8/biozone_air_purifier.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cedec12e-0a14-43b4-b058-3c5c21b8fb43/61473961295.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/hostelworld_barcelona_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/063b5ea5-9597-4d04-bf6b-db76b04ae32d/66858585793.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da3c19a9-0842-4301-9cfc-e3719edbcb01/25497127905.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_off0000c5cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5CB 5436 bytes
SHA-256: abb5a3d115c6d51bf959becf3fe92f6cb84f2a93dcd56c459f52832633c6ce0a
font_01_sfnt_off0000d830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD830 9532 bytes
SHA-256: 2548f6965036af1e8d2ae05deb99a6d5fe178c6458490684085caeeeb3c2a37a

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