Malicious PDF — malware analysis report

Static analysis result for SHA-256 159f511d6615b319…

MALICIOUS

PDF

67.4 KB Created: 2021-02-23 04:27:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: fb787e85e04f093dd6e762e45a7dd935 SHA-1: afe3d2a12b84cbd08047fa4b9fe5383bbd4c7b70 SHA-256: 159f511d6615b319fb6cfed0f51e4fc0780b3c6873e02c1673d39e287fb330f7
214 Risk Score

Malware Insights

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

This PDF file contains numerous links to external websites, with at least one identified as malicious redirector infrastructure. The heuristic firings indicate a malicious redirector and a link farm, suggesting the document's primary purpose is to drive traffic to potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malicious redirection attempt.

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
  • 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://yafferge.ru/strik?utm_term=how+to+play+the+river+by+garth+brooks+on+guitar In PDF document text
    • https://cdn.sqhk.co/jaxabofapuw/TidjaTf/niludawifikokusivezodenu.pdfIn PDF document text
    • https://cdn.sqhk.co/pasojixaju/XggRaig/stray_cat_doors_stage_1.pdfIn PDF document text
    • https://jeletizasi.weebly.com/uploads/1/3/4/6/134640559/zugubipeto.pdfIn PDF document text
    • https://cdn.sqhk.co/ginudaket/ykDigg8/75499364650.pdfIn PDF document text
    • https://cdn.sqhk.co/pifitudebuxo/dgTjhXm/voice_changer_audio_effects_mod_apk.pdfIn PDF document text
    • https://lolutisoxat.weebly.com/uploads/1/3/4/3/134315909/8041612.pdfIn PDF document text
    • https://fibobamoga.weebly.com/uploads/1/3/1/6/131607866/650010.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/benubapopikaj/jikozasobibunisowajadadi.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/quant_job_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/wubovinotosonemagozufowu.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/92922483463.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/84459508552.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_off0000c9db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9DB 5500 bytes
SHA-256: 3b025e3311cf4857727f29fbe1172fda28c6fa1780b5da2535f76da06ba1f7e4
font_01_sfnt_off0000dca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA3 10644 bytes
SHA-256: 5bb408cb8a296a7cea664b6a14338754331b68db547b0793c0a5cdc7762df2f2

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