Malicious PDF — malware analysis report

Static analysis result for SHA-256 585a531904585100…

MALICIOUS

PDF

63.3 KB Created: 2020-11-17 06:11:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: e88a23b170007b936f63a1ab674d7b63 SHA-1: d7833c0677d29c7746bf58482c1e0a17fdfc55cb SHA-256: 585a531904585100bd8dfb5c9061c040052212a6cda4884a380dd3fc8a648ba3
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://trafffi.ru/strik?utm_term=primos+trophy+grunter+instructions PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387821/normal_5f8f9de8af6db.pdfIn PDF document text
    • https://bopiwode.weebly.com/uploads/1/3/4/3/134367631/cecaa327c30cf.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/76c30d49.pdfIn PDF document text
    • https://wetuxabo.weebly.com/uploads/1/3/0/8/130873937/sifana_lasupovapob.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/05fdba07-60c0-4537-b5b0-99acaaea879d/vusekodituzor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71c1ffbe-c540-482b-b10e-e83e9ffa73f2/mis_sentimientos_erroneos_silvia_olmedo_descargar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2d3adbf-eba1-4250-b09a-f17155c13d42/lebuje.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/tatedok.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/zorosa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb7409e5-de10-4e0e-8f74-995c6b615c85/wave_echo_cave_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56a16204-2c8c-4cfe-b7a9-eceb1e0bc28b/sierra_vista_police_department_chief.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b4e566f-b7eb-41f2-8cce-fe7ea9f914f7/92508843299.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 8

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_off0000ba14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA14 5208 bytes
SHA-256: 34f409a82163ad3761706ad42fda5a2fd2f6e9ff5dbbb5b0f196e2ab0d02e37f
font_01_sfnt_off0000cbb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB3 10824 bytes
SHA-256: ba1eaa45fe1c2e46a2207100c9d4e64c5ce4ce05333df739ee90625f46294f42

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