Malicious PDF — malware analysis report

Static analysis result for SHA-256 afa7d6006284a587…

MALICIOUS

PDF

106.4 KB Created: 2020-12-23 01:54:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 48f4ff022bc235a9547ed45e96c28a3f SHA-1: cbd9d44ce81a28a8b062f9c3c52ff784cb136011 SHA-256: afa7d6006284a5870a323a97c181ba666fb41b19e52c282067a61011ca6da379
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The document contains a large number of external links, suggesting a link farm or phishing attempt, with one prominent URL being 'https://trafffi.ru/strik?utm_term=zombie+first+person+shooter+ps4'. The presence of embedded JavaScript, though not fully analyzed due to obfuscation, likely contributes to the malicious functionality, potentially redirecting users to malicious sites or downloading further payloads.

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
  • 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=zombie+first+person+shooter+ps4 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426945/normal_5faa1d095cbac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476427/normal_5fdc25fde4452.pdfIn PDF document text
    • https://molawaxurot.weebly.com/uploads/1/3/4/6/134699933/86e591d38e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496225/normal_5fc826646f5a2.pdfIn PDF document text
    • https://puzomukasudugun.weebly.com/uploads/1/3/4/8/134865935/67b2ad4.pdfIn PDF document text
    • https://wedebiki.weebly.com/uploads/1/3/0/9/130969436/nanejiberafobuno.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383680/normal_5fa9b8ab08513.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/kovilowab/counter_terrorist_mod_apk_android.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce2e950db0542b884e5bbd/t/5fd1a7afb0f0f842d7a3624b/1607575474284/86739326805.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/a_woman_s_guide_to_spiritual_warfare.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/xojim.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/soif_amlie_nothomb_gratuit.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/asdasdasdadasdasdgxb_x_fvvb_9_k.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015b6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B6D 3160 bytes
SHA-256: 78c62020b883e29b47e54ca9d8d9a4418127e0d4dc2283c8a84db2f3cb666f71
font_01_sfnt_off000166be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166BE 5084 bytes
SHA-256: 9c807c4199893fad9a646aa1b34f7fae60a694dd7c4b24e3649a7f00bb0b2733
font_02_sfnt_off000177e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x177E7 10700 bytes
SHA-256: 99fcfd1ed0266f6045e1d3bf5f97df59d4f72a87fa4a8315a9f1a1b844b11b18

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