Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dce6a64d6a80bf2…

MALICIOUS

PDF

69.2 KB Created: 2020-11-25 17:40:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: a65bd7f49e142b5e433a77f2d1cf9e40 SHA-1: ede2addeeec8ada6d32b37e96dcb834a0fa4f59d SHA-256: 9dce6a64d6a80bf2406b08eef42b983d920358876131c1aaa6e369be7c069868
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous external links, with a prominent one leading to a redirector URL that appears to be an SEO link farm for downloading software, such as 'gta v5 apk download'. This suggests an attempt to trick users into downloading malware disguised as legitimate software.

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/123?utm_term=gta+v5+apk+download PDF link annotation
    • https://fitezaxuju.weebly.com/uploads/1/3/4/7/134724711/semeliweta-gikune-lizalenupenepe-malotalemesibi.pdfIn PDF document text
    • https://vobudofokivelux.weebly.com/uploads/1/3/4/5/134599261/44589b1c4cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450042/normal_5fb3d8e74ce69.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/sajezife/small_business_email_marketing_template_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fff26f5d-e3d7-4504-9427-161657f2368d/69793746251.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e474f02-e7ed-4336-98cd-2b908097a506/2005_toyota_sienna_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8059b165-f1cf-40d3-8922-42ed08e2b06c/96355919669.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/how_to_quote_poems_purdue_owl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9561fbb9-eebb-4c72-a929-acbacfeacd5b/xunewasowuladifaxan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64b4866c-bd18-43f8-833e-b71edb06255c/43506776612.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/35909704569.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7217bb7-1762-4974-9ce0-def92dd1d789/pasiwofibe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f06b7ded-ea47-49bc-ad0d-3c5ea92232c9/31933005895.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 6

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_off0000d21d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD21D 5052 bytes
SHA-256: 6a14862018f7545d75eadabed7fa2500b179cf199b74f3db56466be449ccdde4
font_01_sfnt_off0000e384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE384 11380 bytes
SHA-256: e6a3a6f8b9f55dd9b6c3aaf9bbddd0bd137dae5fc0b490e23fa0e1c210db83f5

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