Malicious PDF — malware analysis report

Static analysis result for SHA-256 592258dbc984b0c8…

MALICIOUS

PDF

136.2 KB Created: 2020-11-19 22:46:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: e38c40078842bfdca1047e3bd54dbf94 SHA-1: ec4ea82995eaf3cab6fe37ea09f7d3ca88d03ae0 SHA-256: 592258dbc984b0c80c11324e960b14785f663654f8b8e5ff2fc2efa94e640121
196 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 numerous external links, many pointing to SEO redirectors, indicating a phishing or malware distribution scheme. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification strongly suggests malicious intent. The primary URL, 'https://traffnew.ru/strik?utm_term=chaos+knight+codex+pdf', is identified as a high-risk SEO redirector, likely used to funnel victims to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://traffnew.ru/strik?utm_term=chaos+knight+codex+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408188/normal_5fb347b028284.pdfIn PDF document text
    • https://vususutuf.weebly.com/uploads/1/3/4/6/134634118/e8d18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402951/normal_5f927bd645806.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366381/normal_5f93395b43a94.pdfIn PDF document text
    • https://dutedurelixuvu.weebly.com/uploads/1/3/4/3/134320021/4b8a5a48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386606/normal_5f9731a37273a.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/wegemebufojafak/83571761789.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/beelzebub_manga_zip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2c5e32e-520f-49e6-bec5-26f37d113332/xonuleru.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/89359483455.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/kegaz.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/que_alegria_cuando_me_dijeron_acordes.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/snapchat_apk_10._60._5._0.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 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001dabf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DABF 5324 bytes
SHA-256: 9b5bffdfb032dddf506bdaa3a4248f29b84993f16c7a08d65fac2cbf112fa00e
font_01_sfnt_off0001ece0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ECE0 11332 bytes
SHA-256: 55ebdef60c82121c9fdab1cd1540abec0257b0ae953883f21e6ab368126d8509

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