Malicious PDF — malware analysis report

Static analysis result for SHA-256 e16998e658bec306…

MALICIOUS

PDF

68.2 KB Created: 2020-11-17 08:27:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 0d6e29a9f34717330c0d0e25b1c7e3a4 SHA-1: 04fceeb114409352d4c2515a238a15aafdb2ebfe SHA-256: e16998e658bec30605427de242b72187145f2b479e70f42717f88c52dface2d7
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a large number of external links, with a critical heuristic identifying it as a PDF link farm. The embedded URLs, such as https://traffnew.ru/strik?utm_term=who+goes+there+comic and https://ziripovopibew.weebly.com/uploads/1/3/0/8/130874468/tevoj.pdf, are likely part of a phishing or SEO spam campaign. No scripts were extracted, but the overall structure suggests an attempt to redirect users to malicious content.

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
  • 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.
  • 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/strik?utm_term=who+goes+there+comic PDF link annotation
    • https://ziripovopibew.weebly.com/uploads/1/3/0/8/130874468/tevoj.pdfIn PDF document text
    • https://kisuguwaki.weebly.com/uploads/1/3/4/3/134388310/5014640.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382423/normal_5f915eebee1db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365657/normal_5f8717b8db622.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413867/normal_5fa3e9b25ef99.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/jebupofedijakuk/jariva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dceacb2-14c7-4239-b00d-09e2c94b6076/towuxefa.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/9349751669.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02b7235b-d07a-4f7e-b2b2-345fe2db60ab/leopard_gecko_feeding_bowl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df1e509f-f45e-4da0-a798-e9ab68d8df3b/peziwupetonikogaxojeberu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7daa5fb0-c6f6-4f3a-b90f-0ce7bda17f8e/temperate_grassland_producers_and_consumers.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/fipidejofokevuwar.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/candidate_key_in_dbms_with_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5fedcc3-7e3f-4f49-a410-a5b84dc53543/jovikudotovitifidiwugoku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/373b6fb5-cb39-479c-816e-6667d608659e/98427822855.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd1eec18-21ca-41b3-90ee-d31db28c6505/kifubemadoxuxajafosud.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 6

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_off0000cfc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFC2 4984 bytes
SHA-256: 36754440a74f36d685903be3d565f2682a387a053a4c216aee75faa2c1d0bc10
font_01_sfnt_off0000e0a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A7 10496 bytes
SHA-256: 904103faa61ac6fe6c9f880e62c09a40e8760e336b216a7e54175fd0a2a25057

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