Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b5dedd388eef89b…

MALICIOUS

PDF

61.7 KB Created: 2020-12-21 12:55:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b8c8ab92571f4954782444e8777fa8b9 SHA-1: 026f748514c0b4855ea746fa40c57b5362b144c7 SHA-256: 2b5dedd388eef89b15d810ff70ec61ea40468f80512abf49ed7602530d59ff75
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, many of which point to redirector infrastructure and SEO link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be a lure related to 'basic cooking terms answers'.

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
  • 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.
  • 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.
  • 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://traffine.ru/123?utm_term=basic+cooking+terms+answers In PDF document text
    • https://jafobepajimo.weebly.com/uploads/1/3/4/8/134881918/mixikumas-finapejogalose-vunus.pdfIn PDF document text
    • https://mabanopovofed.weebly.com/uploads/1/3/1/4/131453130/9183887.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472486/normal_5fad69eb4c35f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485826/normal_5fb51cfa5de5a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454545/normal_5fc6b085eb53d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366377/normal_5f8712ee99045.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426677/normal_5f9f2b2cae193.pdfIn PDF document text
    • https://degezumibupupek.weebly.com/uploads/1/3/4/8/134862322/xikameminusufawozu.pdfIn PDF document text
    • https://buvupoxiku.weebly.com/uploads/1/3/4/3/134329971/1da5c6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/35d5bc12-2639-4779-aabe-45ffa8d4517d/razitedume.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/130ca969-0be6-43de-9e78-5fc9b0f76d2d/unit_13_ps_vita.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2593170c-1fc4-464d-9580-b16003cb8454/64673552303.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61d39920-b65c-4196-bfc4-9e4dd47f0b09/85362134948.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5148dac2-126f-44ac-8629-b1d294f16e7b/48892619240.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 2

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_off0000b697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB697 5292 bytes
SHA-256: ff88e15219c5321b43bb521b831bacdaa60cb99c6c1dc207ef46f2ca7544f011
font_01_sfnt_off0000c898.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC898 9848 bytes
SHA-256: 67442a8dc1ee5fa1328f463ff9d6647387aac2bb3824889585d8c8d90c3e4101

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