Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ab7035557383865…

MALICIOUS

PDF

71.0 KB Created: 2020-11-14 00:42:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: d70a5e1a59a29a42958fcec3241cac45 SHA-1: b744dfa6ac0826dcb12aec64071be32dc97b512d SHA-256: 9ab70355573838651388059fd6247ff84f6f555f496e6da31593e469f4cbfb6c
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document utilizes a link farm and SEO redirector to lure users into downloading files, masquerading as a free download for 'rock of ages'. The presence of multiple external links and a high ML classifier score indicate malicious intent. No scripts were extracted, but the PDF structure and external links suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafficel.ru/strik?utm_term=descargar+rock+of+ages PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375517/normal_5faa767b45153.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369511/normal_5f9565a3e562f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387424/normal_5fa9662e60caa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488822/normal_5fab7970c3cad.pdfIn PDF document text
    • https://doriruvoni.weebly.com/uploads/1/3/4/5/134585963/zogawojuremumav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408184/normal_5f9ddbc85412f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368478/normal_5f8a236c524d3.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/27d2eecb-b32f-4140-9075-ddc32081f579/xowep.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/violin_music_notes_for_amazing_grace_easy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59e3bd74-9230-48f4-a480-9bd6e201ce33/holes_anatomy_and_physiology_lab_book_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d49f032-7578-4be8-bc97-e364f710d5e3/25752541344.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb8ff209-463b-4819-9940-1a2e0621f9d2/39566622256.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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_off0000c317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC317 5080 bytes
SHA-256: 27aa7810829a6e8704f1ea95fe469784db350b097532aba86f60b2a8c70b16e7
font_01_sfnt_off0000d47e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD47E 11260 bytes
SHA-256: ecc63c5a7b41abad27ebd3f9bf78b30e9d235fc4ffc71c5bb6a7e3752b4237a5
font_02_sfnt_off0000fa93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA93 16076 bytes
SHA-256: b12fd7abebef46c6af06114fd52e3a226bf6873093cd64b6bfea0858fd0ebc42

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