Malicious PDF — malware analysis report

Static analysis result for SHA-256 68b8704ab635808f…

MALICIOUS

PDF

136.8 KB Created: 2020-11-22 19:16:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: fbab9afd81d3903960490c905d46df4e SHA-1: 1c5d8b9dcd95397a0b8dba28df4ebb111cbcb7b8 SHA-256: 68b8704ab635808f424557041b8bac86d16fecd52ffddbe399dc7a29451f9767
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, characteristic of a link farm or SEO spam. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The embedded URLs, such as 'trafffi.ru', likely serve as lures to malicious sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/123?utm_term=black+luster+soldier+envoy+of+the+beginning+1st+edition+price PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369183/normal_5f8c5a1bcb254.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451350/normal_5fa60367db35e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387424/normal_5f8dc41c2a749.pdfIn PDF document text
    • https://nimorozidu.weebly.com/uploads/1/3/4/3/134373006/b3be5b7.pdfIn PDF document text
    • https://kedifekutijita.weebly.com/uploads/1/3/4/7/134713117/0acbc87b03a.pdfIn PDF document text
    • https://diriremipujuna.weebly.com/uploads/1/3/4/2/134265666/69a9a9c6.pdfIn PDF document text
    • https://mogidudurunupiz.weebly.com/uploads/1/3/2/6/132695636/rijeseka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447874/normal_5fb2e6c78d75d.pdfIn PDF document text
    • https://xalipifizipig.weebly.com/uploads/1/3/1/3/131379045/givigugi_guzaba_gapagixopefif_gevugevatikita.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/dowadotiju/iis_riyadh_worksheets_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/angular_template_input_validation.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/bumuza.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/43818754922.pdfIn PDF document text
    • https://s3.amazonaws.com/kafifawono/yoink_executor_key_pastebin.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_off0001d486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D486 5884 bytes
SHA-256: b61b21b571c0f53ec1b2584bd9b3a9ba52aefba813b2a1018b9b3e4fa94598ca
font_01_sfnt_off0001e89c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E89C 14452 bytes
SHA-256: 4add5ef6baa5d4090c8e7ab6e318a103d88906775f813fbbfa53674ea7678ab5

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