Malicious PDF — malware analysis report

Static analysis result for SHA-256 e56a6e003bb37f66…

MALICIOUS

PDF

68.3 KB Created: 2020-12-15 18:56:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: fa84f9bd7d34da86b04dc2686b7ceb23 SHA-1: b59091eb78f6d7c5863b882cc015e2de65c8ca4c SHA-256: e56a6e003bb37f66736e63cba9296e0851d4c57e16d7418479e65f285b65a1b6
136 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 was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_UTM_REDIRECTOR_LINK' specifically points to a phishing lure designed to redirect users to a malicious site, identified as 'https://trafftec.ru/strik?utm_term=does+publix+sell+single+stamps'. While no scripts were explicitly extracted, the nature of the PDF and the redirector suggests it's part of a phishing campaign, likely using embedded exploits or JavaScript to facilitate the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafftec.ru/strik?utm_term=does+publix+sell+single+stamps PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4454054/normal_5fcf07933475d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418367/normal_5f9eb49299f33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406481/normal_5fa0f3c2753bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420600/normal_5fbac246dd5fe.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/7281d8f9-16fe-43ef-9d25-8858f19efbe3/21735199268.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0f15968-22ee-49a2-a5df-b242f45b4e88/suloworas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/585c0b84-20de-4d2f-8ded-1186fa7b831f/escala_de_grannum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/225a5a99-1676-46ea-8c6f-9764b14f39e7/zizumitigulabonojo.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/tiropavejepil.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/cg_song_website.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/piwebu.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/78223307521.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/13262988160.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 3

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_off0000cf45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF45 5252 bytes
SHA-256: aacc8c3e4206bc02ccf0831cfce5cd0b86a9c618bce3083bc9554f864135c91f
font_01_sfnt_off0000e11a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE11A 10240 bytes
SHA-256: 677ec9a8f938863648b4be7cb39af50bcf7ea6428a382cdfc4021018cc44a7b7

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