Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5c161980071911d…

MALICIOUS

PDF

86.4 KB Created: 2021-01-01 13:53:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 67b74d39fc12f0516de85a3597cc5050 SHA-1: 0c3a4d9399318ff886dbd9db11720fa5a33932c6 SHA-256: a5c161980071911d8cd96906c5c67240bf33ac70e7818b2da23f9bc2b48124dd
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains multiple heuristics indicating malicious redirection and link farming. It embeds a link to a redirector URL, which is part of a larger network of links designed to lead users to other PDF documents. The document body, though heavily obfuscated, contains text that appears to be a search result snippet, suggesting a phishing or scam lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gettraff.ru/123?utm_term=pho+noodles+near+me In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374979/normal_5f8af5b13e86d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425727/normal_5fc4f81b58cd5.pdfIn PDF document text
    • https://gupoxebexu.weebly.com/uploads/1/3/4/3/134337811/2372769.pdfIn PDF document text
    • https://cdn.sqhk.co/wawerugile/BiigchV/64830053186.pdfIn PDF document text
    • https://cdn.sqhk.co/rojarasam/qSigfMY/cricket_bowling_speed_machine.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/bd887092-a73f-4010-a9d6-26539276f06a/pepupowazakurodik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4221fd9b-791d-423d-8ef3-569a3e95b88c/vawuratomuviwumugipegi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ed957b1-2b93-4499-9f14-59c0f721e3bf/ingenieria_de_manufactura.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41c45029-4c79-4acd-8018-2ab70e6b2cdf/81165764930.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/818180ca-f035-4631-8d86-a2f0564cb1cd/operations_management_by_william_j._stevenson_13th_edition_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/ecommerce_html_template_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a4e7698-3b54-4b9f-988b-6beb8356f19c/13292661087.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2317f6af-018d-4430-87bb-465e51ca92bb/ultrax_labs_hair_surge_vs_rogaine.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_off000116f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116F2 5064 bytes
SHA-256: 61f40887df52392ec1b6c1a32576fae46db33a6ac88cf85b79a6f4e93926ea97
font_01_sfnt_off000127fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127FB 11004 bytes
SHA-256: 1ea2b30c83b58b9aad10d3a68c4c798f2ea5c7262655862aef3899861590736f

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