Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f2ff2b4d85dde65…

MALICIOUS

PDF

66.0 KB Created: 2020-11-18 04:59:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 57de29f25ef697228eed9b6fa6a623c0 SHA-1: 3fbc737bb2b0e51b034ffdf3a4c11ade8be65ea2 SHA-256: 9f2ff2b4d85dde651a275dbc67541ff616570c44516700d59554ddea5464ea3a
214 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, specifically flagging it as a redirector link and a link farm. The embedded links, such as 'https://traffking.ru/123?utm_term=unblocked+dino+run', likely lead to phishing sites or further malware downloads. The presence of numerous external PDF links suggests a coordinated effort to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://traffking.ru/123?utm_term=unblocked+dino+run In PDF document text
    • https://wizaxonaguwaxi.weebly.com/uploads/1/3/4/3/134306690/zufewavisorajimin.pdfIn PDF document text
    • https://resumaseba.weebly.com/uploads/1/3/4/3/134318739/5bf29b8bf0a40ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448744/normal_5fa5481e1c0ee.pdfIn PDF document text
    • https://dobuzitususuv.weebly.com/uploads/1/3/4/4/134470967/3098355.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369659/normal_5faab9348cc3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386089/normal_5f8d576cbaeb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407749/normal_5fb39bfa3908b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375351/normal_5f89762f60feb.pdfIn PDF document text
    • https://kizozejibudi.weebly.com/uploads/1/3/4/4/134460324/gafaturuduxodakemope.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369504/normal_5fa4aa55e7713.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/4df5f318-d9c7-41b6-8bda-567b90dd7e5e/14456100229.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_off0000c9cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9CC 4740 bytes
SHA-256: 6158bc15d97a610ebda6076b1d05e94a18e1cdd0dcd62ca2fbabf4d90268c03c
font_01_sfnt_off0000d9fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FC 9884 bytes
SHA-256: beebc80b2bc90392de890792b0565525a0ba220b7ce34af909f7bed249c9438c

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