Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d7282809068fb40…

MALICIOUS

PDF

82.5 KB Created: 2021-02-22 05:47:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 0092a078babf20316c46f1345645d28d SHA-1: ce33ef3553f6db17bd6f13f0defe5dfdcf7ec038 SHA-256: 5d7282809068fb40b4756aef38b30ec01e5f22b1bec82bea318f8563cff9ed69
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to SEO-related content, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs suggest it's designed to redirect users to potentially harmful websites.

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://leonvi.ru/wix?keyword=manual+treadmill+for+dogs PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4469358/normal_600942f994ca0.pdfIn PDF document text
    • https://bofejaximolapob.weebly.com/uploads/1/3/4/7/134751884/7641018.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392191/normal_600010a2e7e15.pdfIn PDF document text
    • https://zeruxitewisav.weebly.com/uploads/1/3/1/8/131856065/rajivaxojuzikudedida.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448549/normal_6026f2b08071c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447878/normal_6011d6582ff96.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416796/normal_6007c793a901d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468286/normal_5fee107aafc8d.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/jevelel/albertus_nova_black_font_free.pdfIn PDF document text
    • http://faxanudof.epizy.com/wepoxujubipabewezimewipex.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/las_bases_nitrogenadas.pdfIn PDF document text
    • http://zuzeburim.epizy.com/88340973022.pdfIn PDF document text
    • http://riwexakax.epizy.com/vakidatenizanepowuligezo.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/gb_twitter_apk_latest_version.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/ropekode.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_off00010668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10668 5232 bytes
SHA-256: d5e0b14affa0774049a8cf64b46d0538cb9ad1cc1e389e52fdbe164dd8422d1b
font_01_sfnt_off0001182f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1182F 10728 bytes
SHA-256: 50eb5b1bbdb62f6d93b85f1875ed97d21f9661028f4fe77fb3e59338a4a0c778

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