Malicious PDF — malware analysis report

Static analysis result for SHA-256 997930153afbbcda…

MALICIOUS

PDF

67.1 KB Created: 2021-01-01 18:41:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: e045f7403e562a5373c98f4dd44accaa SHA-1: 9e5da025853e0c2ad647101032c7c8a9b4201eb6 SHA-256: 997930153afbbcdaa166fd2f5482211d856bd6cb456f4d72bcf19f8462b8e5e4
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 of which are part of an SEO link farm, suggesting a phishing or scam attempt. The presence of a redirector URL and the ML classifier's high confidence score indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links point towards a social engineering attack designed to trick users into downloading further malicious content.

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://trafftec.ru/123?utm_term=indeed+cover+letter+format PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383917/normal_5fd0efd79d969.pdfIn PDF document text
    • https://cdn.sqhk.co/sijiposago/jhjaieh/92037945737.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470387/normal_5feb475bc8528.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370528/normal_5fde00055c955.pdfIn PDF document text
    • https://cdn.sqhk.co/menaleratupo/rifaxih/27237623099.pdfIn PDF document text
    • https://xepebujusu.weebly.com/uploads/1/3/4/3/134319702/1793037.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/ea67d394-559f-4312-bec4-d88e34ba1634/golaxova.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f895e413-d588-4786-9c73-4fc96f67c924/72706956518.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bd87863-3683-486c-9285-5eb5c72fe974/aaa_of_michigan_careers.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/bumblebee_theme_song_transformers.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/digital_photogrammetry_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70095125-d549-4a65-a8ac-700cc53a6b17/lamogudarekizubirenelo.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_off0000cd30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD30 4988 bytes
SHA-256: 8bb01a6cc945586eb85b09bcaaa5fa26b1e331c1995ea03d42db5f99bc0a023a
font_01_sfnt_off0000de12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE12 9832 bytes
SHA-256: 4e572a383b77c149d7ed6e3cf8b557bb35a87815c16dde7e07faf0b1a1acd896

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