Malicious PDF — malware analysis report

Static analysis result for SHA-256 790729600cac1b1e…

MALICIOUS

PDF

64.7 KB Created: 2021-01-25 07:42:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 7612f29b733303cdcedc99b69cbc4848 SHA-1: df9779cbbd6d883ec6a2f72a03ed548be2cc6a9f SHA-256: 790729600cac1b1e5fa8240b0932a33302626b8fc355561f2200c7a42da7955e
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a significant number of external links, many pointing to Weebly and other hosting services, indicative of a link farm or phishing distribution. The presence of a UTM parameter in one of the primary URLs suggests a tracking mechanism for user engagement with the lure. While no scripts were explicitly extracted, the heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_UTM_REDIRECTOR_LINK' strongly suggest a malicious intent to redirect users to potentially harmful content.

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
  • 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://maypoin.ru/123?utm_term=insectionator+zombie+mode PDF link annotation
    • https://pukelubaluwo.weebly.com/uploads/1/3/4/7/134741361/16e16bd82.pdfIn PDF document text
    • https://cdn.sqhk.co/pumopivosoba/cKHF0b8/xuliwonige.pdfIn PDF document text
    • https://cdn.sqhk.co/ralapogifur/M7hhSr0/64440873042.pdfIn PDF document text
    • https://famepajovajegow.weebly.com/uploads/1/3/1/4/131438188/gowagudezabigor.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492574/normal_5fe41d4dc6f56.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479705/normal_5fffe4e49c6a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492555/normal_5ffbf9479c289.pdfIn PDF document text
    • https://cdn.sqhk.co/fabadipub/DhjgjYs/66408596997.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415308/normal_5fe3092871b57.pdfIn PDF document text
    • https://laxonetamaj.weebly.com/uploads/1/3/4/0/134096763/3029941.pdfIn PDF document text
    • https://cdn.sqhk.co/xelalizogim/XLzxtY8/zombie_smash_android_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501660/normal_5ff4dd86a4ccd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366324/normal_5ff8f6a2475fc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485569/normal_5fe2e61d86a70.pdfIn PDF document text
    • https://cdn.sqhk.co/rubekafux/hg1uTmW/nakonasagefu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411717/normal_5fcfb3029591e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463286/normal_5fd260f6182fc.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/kiguteperilodu/fupojetiribamipuwisoset.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_off0000c034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC034 5180 bytes
SHA-256: 1da6c133fee687f7c86a70ebf32170afce5ffe55094c00bd6ff04e16572fbe92
font_01_sfnt_off0000d1c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1C1 10624 bytes
SHA-256: 63aab104eaf5d5187bd89375ab433e689f3e534a5c46b2adf3e8a98b3b7f4e77

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