Malicious PDF — malware analysis report

Static analysis result for SHA-256 7956cd9cd1818ffb…

MALICIOUS

PDF

89.0 KB Created: 2021-01-06 09:10:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 3767b85cca65ff4f6b470d366fef4078 SHA-1: b825272cce7202ce570569826f2534a303ffcfcb SHA-256: 7956cd9cd1818ffb864ceab7d5a729ec1399615306617726c4f380dc7934fe08
214 Risk Score

Malware Insights

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

The file was identified as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, including a critical finding of a redirector link to 'ggtraff.ru' and a link farm pointing to 26 external PDFs. The presence of these links suggests the document is designed to lead users to malicious or phishing sites, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/123?utm_term=all+might+rising In PDF document text
    • https://majuzifulanapu.weebly.com/uploads/1/3/4/8/134887757/xazexibepunirijawu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393883/normal_5fe2792453b86.pdfIn PDF document text
    • https://cdn.sqhk.co/zovigobut/hdJSgi5/24701863301.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411919/normal_5fa6e6b39c4bf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476595/normal_5feb43c495d74.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415051/normal_5fed3dc25a1c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366304/normal_5febfb4598145.pdfIn PDF document text
    • https://jibabarudemafe.weebly.com/uploads/1/3/4/7/134748102/lilujumusorogi-revemuzepitan-fozeduwonitesir-viwadubojadejez.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/polojuliragam/project_aware_logo.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/35166299743.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/xowuwogane.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/netacad_cisco_chapter_1_exam_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/ufc_app_hack.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000112fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112FA 4440 bytes
SHA-256: 2a4eb56b0bd11d3097ac629bfb887c3b6ae4c6208695562810d8080e8764b810
font_01_sfnt_off000121c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121C9 11448 bytes
SHA-256: 2c2b272a699fc48121107d4bffbbb79fb97e438be63994d438acf4f8060372e9
font_02_sfnt_off00014909.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14909 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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