Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac08e3b80e1dec08…

MALICIOUS

PDF

68.6 KB Created: 2021-01-05 19:55:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: de322f371b04df453bd2d22893e87b32 SHA-1: 766eef8a020415f79f3f2999d8bc05f544420443 SHA-256: ac08e3b80e1dec085ae7d48ce8f8319f186480606d47d4b828534b53d5e61365
196 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized and lead to redirectors, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious activity.

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://trafffi.ru/aws?utm_term=cambridge+ielts+2+listening+test+4+answers PDF link annotation
    • https://cdn.sqhk.co/bifugudawesu/Y8gieih/exogenous_infection_bacteria.pdfIn PDF document text
    • https://jotulamopusojo.weebly.com/uploads/1/3/4/4/134465369/3048823.pdfIn PDF document text
    • https://cdn.sqhk.co/xiwapusumoge/ifhuASK/modern_warfare_3_weapon_list.pdfIn PDF document text
    • https://cdn.sqhk.co/kepebeso/emibVig/bugufudenupiwokapinip.pdfIn PDF document text
    • https://folejate.weebly.com/uploads/1/3/4/9/134902611/4da557.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/zuvefusu_tewojawowebav.pdfIn PDF document text
    • https://cdn.sqhk.co/sezogitov/hjW3hfF/bubetizireke.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/clion_platformio_plugin.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/98603827883.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/mapudipazumifopusofodu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://youtu.be/ihi3hKeKXX4In 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 5

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_off0000ce30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE30 5504 bytes
SHA-256: b4b2a1dc48d8880bb1c2f3a383080678fe37deffcea9897d11c0fbf198fb84ae
font_01_sfnt_off0000e0dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DD 10900 bytes
SHA-256: ce4c96c191c1ac9dd2b2d66311be10d97b0116a19b8e2778d09dee159d6bbd7b

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