Malicious PDF — malware analysis report

Static analysis result for SHA-256 bde98567f614e07a…

MALICIOUS

PDF

73.4 KB Created: 2021-01-11 11:22:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 27ab1cb59a6a8c333c3efb111e878b4e SHA-1: fd021831d812a5d17a11feb8d27b0ad70fa9b6cd SHA-256: bde98567f614e07a28776e239634afe0921c0b436d7957e76f9b1850f8e9e7ba
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, many pointing to SEO redirectors, indicating an attempt to drive traffic to malicious sites. The presence of a specific URL, 'https://traffnew.ru/123?utm_term=dominos+hamburger+topping', combined with heuristics like 'PDF_SEO_LINK_FARM' and 'PDF_SEO_UTM_REDIRECTOR_LINK', strongly suggests a phishing or malware distribution campaign. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent, likely related to initial access via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://traffnew.ru/123?utm_term=dominos+hamburger+topping PDF link annotation
    • https://site-1168348.mozfiles.com/files/1168348/om_nom_run_mod_apk_1__0__1a.pdfIn PDF document text
    • https://site-1195605.mozfiles.com/files/1195605/legion_of_ace_chaos_territory_mod_apk.pdfIn PDF document text
    • https://site-1177365.mozfiles.com/files/1177365/89689743001.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465905/normal_5ffb80bfe72f4.pdfIn PDF document text
    • https://finuvowevemez.weebly.com/uploads/1/3/5/3/135397693/385cd04.pdfIn PDF document text
    • https://site-1174278.mozfiles.com/files/1174278/zuxaximuleniloniko.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/farefasejikap/after_burner_climax_apk_obb.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/mike_winchell_fnl.pdfIn PDF document text
    • https://s3.amazonaws.com/nisiwanolom/cert_pem_format_example.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/16220016669.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D4 5340 bytes
SHA-256: 6603b799c8642514f222e153c3abf42e1a907f8248734978c60bb0edb455a055
font_01_sfnt_off0000f4d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D4 10792 bytes
SHA-256: a32cc9c1fa3895a4582288dc1bfad6e3a5935f44286629ace1b5e53e11bd26b2

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