Malicious PDF — malware analysis report

Static analysis result for SHA-256 92ade19df3eb19c2…

MALICIOUS

PDF

70.4 KB Created: 2021-01-15 13:37:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a9c5e197b61d04bcd0e096f7e0c7137f SHA-1: 76aae40912e6bd764e42baac8e9d717bd2659e6f SHA-256: 92ade19df3eb19c2252d9bb039eb68e02c6c2d70fe14d410b83d17fbced81f45
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one identified as a malicious redirector. The heuristic firings indicate a link farm designed to direct users to potentially harmful content. While no scripts were explicitly extracted, the nature of the embedded links suggests an attempt to lead users to phishing or malware download sites, aligning with common social engineering tactics.

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/aws?utm_term=contemplate+deutsch+englisch In PDF document text
    • https://cdn.sqhk.co/torujazelome/hggfiiK/xumusolibiw.pdfIn PDF document text
    • https://linebabeta.weebly.com/uploads/1/3/5/3/135317009/18c8d45db8449cc.pdfIn PDF document text
    • https://xekukagakodepa.weebly.com/uploads/1/3/3/9/133999272/4851519.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471096/normal_5fe1b69174cae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382793/normal_5f8d2f0e62667.pdfIn PDF document text
    • https://cdn.sqhk.co/lobitukojuro/didgd0c/9105929136.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414494/normal_5fdbd5c9527dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387060/normal_5fe7d5fe21248.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/likewuvipuwinejewuj.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/valozigotumudewire.pdfIn PDF document text
    • https://s3.amazonaws.com/wovedukevikov/9638496864.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/rojovisila.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/aviation_week_android_app.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_off0000d8a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A3 5296 bytes
SHA-256: 1dc93d8c6bb0c61378cd7e7d8d32680d37daca15b50dd1bba90c1af526871579
font_01_sfnt_off0000ea7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA7C 10152 bytes
SHA-256: 670a618f175ea2e04ec15d212a3506570ae03e44f99581847619a198a9a0aea6

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