Malicious PDF — malware analysis report

Static analysis result for SHA-256 738c0fde1595e472…

MALICIOUS

PDF

92.9 KB Created: 2020-12-26 13:00:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d97ce13a9bdd4a8857ef7bd42cc3fdb1 SHA-1: 9cb4ee86ebce826bff24d9f790bed0a376195e24 SHA-256: 738c0fde1595e472827d90a825fc71f4e4971ca621086b7c385a71d61421a122
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 file contains numerous external links, many of which are part of an SEO link farm designed to redirect users to malicious sites. The primary lure appears to be a game cheat sheet, leading to a URL that is likely a phishing or malware distribution point. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a high likelihood of a phishing or trojan payload.

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://trafffi.ru/strik?utm_term=john+gba+lite+cheats+pokemon+emerald PDF link annotation
    • https://dupopawo.weebly.com/uploads/1/3/4/6/134652833/fulutubipetu.pdfIn PDF document text
    • https://nujelojebalu.weebly.com/uploads/1/3/4/6/134690198/9fb0dfd5ba.pdfIn PDF document text
    • https://balabirow.weebly.com/uploads/1/3/4/6/134690292/0b47e0068.pdfIn PDF document text
    • https://zisokilusativ.weebly.com/uploads/1/3/2/3/132303079/soxuzodo_lunapomusotatav_wedumufobunu.pdfIn PDF document text
    • https://lodokevez.weebly.com/uploads/1/3/4/4/134476034/1bf1a.pdfIn PDF document text
    • https://mixorone.weebly.com/uploads/1/3/1/4/131438240/mepuzi_daxozamigumu_banowijafupuvi.pdfIn PDF document text
    • https://wawenefawopi.weebly.com/uploads/1/3/4/4/134494228/3691183.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/kulinisokakewi/tazeja.pdfIn PDF document text
    • https://s3.amazonaws.com/juxatop/tragic_flaw_definition_and_examples_in_literature.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd19b1c2-bc2a-4f77-bb35-d8260cfaa13d/vuwalaxoxebesifalak.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/49845261177.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/pafuluk.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/rivexenenuvonopepetonero.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/95008446375.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_off00012e08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E08 5680 bytes
SHA-256: 3033a73d9d1e79b75eb218944c2c89813b6d182ba215ba3018b1502f4f2fc2ea
font_01_sfnt_off00014127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14127 11324 bytes
SHA-256: 4b92bbe622d172c370ebdffe690486b5b1f3c1f571bf7a6d6b156d8c8dd8a37a

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