Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c582713e31da0ff…

MALICIOUS

PDF

65.3 KB Created: 2021-01-01 07:44:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 10fd04543569584ee2840d3e6838b113 SHA-1: ef6724a42da034370f740ce300d1f2365149d93d SHA-256: 7c582713e31da0ff6f51779e582b86df9c738771782a2932dd6386571c82e3cd
222 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cctraff.ru/strik?utm_term=4+in+a+row+king+apk In PDF document text
    • https://mogijoduvide.weebly.com/uploads/1/3/0/8/130814471/kuxesomerak.pdfIn PDF document text
    • https://nunigatomupava.weebly.com/uploads/1/3/4/3/134314222/divegom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388157/normal_5fa1679b743cf.pdfIn PDF document text
    • https://vajugape.weebly.com/uploads/1/3/4/7/134767319/xuposavofodogibux.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/palikuvexake/xipajorunenodudufujebami.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/730049b8-863e-4e15-a4d1-39bcfd9e8aeb/nipotixobodebipu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/676dc1db-afce-42cf-854d-04b211a508e4/zuxigabasadesibinesuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e0aa260-ab11-491d-9697-a31600343e84/30685005673.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f63b643e-02e2-4411-930d-9440ac179e1d/genujiwobutan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/707aa53f-4271-4647-a12c-86f60d4f6e77/family_barber_shop_dewitt.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 5

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_off0000b6d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6D0 4516 bytes
SHA-256: fd9e320119774f3325eb4250d48ea9a0be1f4c552711c4634a4c9b3557c69fa6
font_01_sfnt_off0000c633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC633 10668 bytes
SHA-256: 47154ddbb89d57e70e775df7502e47b72554c112f00b45a215ccc353bdc0d988
font_02_sfnt_off0000eae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE0 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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