Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f141b91696fa3f5…

MALICIOUS

PDF

70.4 KB Created: 2020-12-24 20:42:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 677e1e4c3eb9216e4d6e96d7325a0f04 SHA-1: 909cb7ca0f357cca28f3fc41fa7f5e0b04b79e1a SHA-256: 2f141b91696fa3f564a678f42c463e3a851ceb772d43714d275d921593650483
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a high-confidence ML detection and ClamAV signature for phishing. It includes a URL disguised as a movie download link, which is a common lure for phishing or malware distribution. The PDF structure and embedded URI heuristic further support the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffe.ru/aws?utm_term=insomnia+full+movie+tamil+dubbed PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386091/normal_5fd7286ed1a1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422877/normal_5fdb2ab3b2fdf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421478/normal_5fd066e5c3307.pdfIn PDF document text
    • https://cdn.sqhk.co/tezakagadol/Bhe8hac/42674885795.pdfIn PDF document text
    • https://godosofebi.weebly.com/uploads/1/3/4/6/134651625/2173176.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484635/normal_5fc400e6a1bd7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403410/normal_5fcceddce0192.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480735/normal_5fc2c5d677092.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn 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/96e9b315-07ad-468a-91cc-e6d0ae042db0/64536703989.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000c66a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xC66A 14420 bytes
SHA-256: 14f100853d46c75ab9b2407a6ccde65410971a746926fac9cdf734b4e7a053d1
font_00_sfnt_off0000b523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB523 5096 bytes
SHA-256: 22249d096840dec33aa5152a72a22a309d9ff79c0fe814192a5f5172a1cb9899
font_02_sfnt_off0000e95b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE95B 10304 bytes
SHA-256: 0f40ee95b76d0358634517eb1c773b9ef28abcc5e53473f4e64e8ba110b2e38d

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