Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d70aef54cad8b6b…

MALICIOUS

PDF

109.1 KB Created: 2021-01-24 15:45:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 1c04ced1ccac57668f8b7762e7f781d0 SHA-1: 7c75142028e072476e314a69afc00ab151114d3d SHA-256: 2d70aef54cad8b6b844ac00af01480036de79bacda6b24ce9fa1c0d77681b624
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 by the 'PDF_SEO_LINK_FARM' heuristic, suggesting a malicious intent to redirect users to potentially harmful content. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan. The embedded URLs are the primary indicators of compromise, likely leading to further malicious stages or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/123?utm_term=otto%2527s+irresistible+dance+pathfinder PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4443292/normal_5ff3feead17fe.pdfIn PDF document text
    • http://fanogizakelime.iblogger.org/95904751790.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482671/normal_5fc7e878063e2.pdfIn PDF document text
    • http://gazzsheff.xyz/80s_dance_music_best_compilationz0k5t.pdfIn PDF document text
    • https://cdn.sqhk.co/kavejufa/Kf9iehc/crazy_scary_teacher.pdfIn PDF document text
    • https://cdn.sqhk.co/lijipatalenu/6pF8hdD/zomokuletaraxubanavejif.pdfIn PDF document text
    • https://japujavawewiri.weebly.com/uploads/1/3/2/6/132696154/7951677.pdfIn PDF document text
    • http://smotrikino.fun/zuzonun8ln4n.pdfIn PDF document text
    • https://bezaxopev.weebly.com/uploads/1/3/0/7/130740011/736473.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403805/normal_5fc74f6911a96.pdfIn PDF document text
    • https://lifexego.weebly.com/uploads/1/3/0/8/130874678/newol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380882/normal_5fe9846050279.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487382/normal_5ff7769b3f290.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fisejotigu.epizy.com/spongebob_games_free_full_version.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_off00016e53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E53 5444 bytes
SHA-256: 02c2ca21b8cd04b2093d7423b0de764e610d913b7782238be443b2ebf18ffd2f
font_01_sfnt_off000180cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x180CC 11208 bytes
SHA-256: 6ed57efec3d16c5c17b52619d3a62e0f275e5eb9b578a2f4c16d22a092c9c4b5

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