Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ddbe3d739ccef1f…

MALICIOUS

PDF

91.1 KB Created: 2020-12-27 18:40:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 4248b34cc5e41aa48d4daa2c00db2453 SHA-1: b63b5dbb05ef735fe70c8c130d5ce0fe3879d30a SHA-256: 9ddbe3d739ccef1f8e540ca0683c5c8f8660f860618100ee8d71cf1984357a21
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document was flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure and a large number of external PDF links. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves luring users through a link farm to potentially malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/strik?utm_term=elune+tier+list+reve In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375907/normal_5f90ade58ef69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384050/normal_5f8e51da6e1ac.pdfIn PDF document text
    • https://cdn.sqhk.co/fuluzezufe/jUdcjab/24974553213.pdfIn PDF document text
    • https://cdn.sqhk.co/zirimikuj/RZ9Wb56/luvok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368976/normal_5fba03ac732d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373508/normal_5f953f42268e5.pdfIn PDF document text
    • https://cdn.sqhk.co/bebumula/jhbnVet/lozawelefozepegiwulig.pdfIn PDF document text
    • https://lasebotoxuxuxir.weebly.com/uploads/1/3/4/7/134729765/f182cd5f00c7262.pdfIn PDF document text
    • https://cdn.sqhk.co/zatugudaxaji/bXhavDG/pee_wee_herman_soundboard.pdfIn PDF document text
    • https://xanibizodiwanid.weebly.com/uploads/1/3/4/6/134614549/wuwelusozunisej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422150/normal_5fbec9fdb4a40.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/775e1e3a-3b5f-4e4c-b097-7ac5fcecbeb8/iso_4406.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/75996368710.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e622578d-72db-461b-aebc-a49ae30bfc5e/taxogoxoluwogaligel.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 4

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_off00012910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12910 4488 bytes
SHA-256: f282cf1608abcccc0de07ac98777e9eab58c9ee466ee1a027adf0e1cc12516bf
font_01_sfnt_off00013868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13868 11624 bytes
SHA-256: dc6eef7e87a7d93d263fc16632021ba014938c68bb3d6fd5882313a1fb6d72bf

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