Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ae3e460ecede9d9…

MALICIOUS

PDF

75.1 KB Created: 2021-02-26 11:31:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: c31501b3e46faa9952bbb75f035d7c1d SHA-1: f1991766bdb5186360b93cadd5b1767be1944927 SHA-256: 7ae3e460ecede9d9aa804503e8dec6c0f99bae61a225638d2859911c38772d27
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many of which are to PDF files, suggesting a link farm or SEO poisoning attempt. One prominent URL, 'https://xajibur.ru/strik?utm_term=usb+vid_138a%2526pid_0011%2526rev_0078+lenovo+driver', is presented in a context that implies it is a driver download, likely to trick users into clicking. The ClamAV detection and ML classifier strongly indicate malicious intent, likely involving exploitation or phishing.

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://xajibur.ru/strik?utm_term=usb+vid_138a%2526pid_0011%2526rev_0078+lenovo+driver PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4379974/normal_5fc80f25c1145.pdfIn PDF document text
    • https://baxemajoxololur.weebly.com/uploads/1/3/1/0/131070692/1811361.pdfIn PDF document text
    • https://tugalebuwe.weebly.com/uploads/1/3/4/0/134012885/9b559.pdfIn PDF document text
    • http://sarkife.site/77537645109ol0ki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501204/normal_6014a16ff07fc.pdfIn PDF document text
    • https://cdn.sqhk.co/loganidob/kidVhiN/83395792031.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481675/normal_5fc9e86b4443e.pdfIn PDF document text
    • https://mugakosi.weebly.com/uploads/1/3/1/3/131379948/lisinej.pdfIn PDF document text
    • http://stroiline74.ru/binary_to_decimal_examplesltoww.pdfIn PDF document text
    • http://bullbananavannaone.xyz/caperucita_roja_y_el_lobo_enamoradopmxpu.pdfIn PDF document text
    • https://tevupuzenoxa.weebly.com/uploads/1/3/6/0/136009769/japopov.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/mejados/22098345542.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/betodu.pdfIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/zaxuwasuzetepe.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/aruba_3400_controller_configuration_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/33106116551.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/11303819614.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_off0000e7c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C5 5320 bytes
SHA-256: 38f668c90ca325438482c2a0b22433a96bbde2ea7fe7a7bdf706fe6fc814faff
font_01_sfnt_off0000fa04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA04 11228 bytes
SHA-256: 645bf34f257d374ac82933496d4dd4ddde0756bce73edc53e56eb82de07c1c95

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