Malicious PDF — malware analysis report

Static analysis result for SHA-256 688582a4d988d3a5…

MALICIOUS

PDF

61.5 KB Created: 2020-12-13 14:52:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: eb8b1ff0cad35c5c37e2ea64a4ccd1e5 SHA-1: 84da74cb4f4bf1861ebf88f05655a270241df092 SHA-256: 688582a4d988d3a5df2656353a3ff5dc800cb965a37053f716d8b3c3cac667ec
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a PDF link farm. One of the primary external URIs, 'https://trafffe.ru/strik?utm_term=paula+young+wiglet+colors', is flagged as suspicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafffe.ru/strik?utm_term=paula+young+wiglet+colors PDF link annotation
    • https://mugekezozo.weebly.com/uploads/1/3/1/6/131636766/vamuru.pdfIn PDF document text
    • https://wuduzavuvavazi.weebly.com/uploads/1/3/4/6/134618101/veruzimonewug_viwakavesezif_teladu.pdfIn PDF document text
    • https://zopopalolidipe.weebly.com/uploads/1/3/4/5/134500843/lafobenaxiteme_jeduluma_tigamatod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc1012fe5c7695ca99c31f6/t/5fc1929af8cdb769c61f075a/1606521501232/london_by_william_blake_literary_analysis.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc59fc86609fd0ee7b1b465/t/5fc66ec1f81c9a2a0c8137c7/1606840001917/41637810693.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd25d27fc6d42cb7295ac2/1606231506510/96039144449.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae2acd0d-3ead-490b-9d19-31ad4daf0fb4/dr_seuss_technical_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fceb0467e980a32d6879685/t/5fd5f0a95b1f6f7539cbd075/1607856297750/makita_jigsaw_blade_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90a620c4-9656-44a9-a1c8-29d3c2a7b6e7/93117950563.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf48b0fa04221c71165cc4/1606371505049/tenor_sax_sheet_music.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcf15e67d46c3615fb096e2/t/5fd5fc12164d0f203c705c88/1607859218469/80716471181.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_off0000b12b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB12B 5164 bytes
SHA-256: c6be8f8d3f5325232650eaae7c6e7aa485e7731444770fe155e233dc7fd0fe47
font_01_sfnt_off0000c2e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2E7 11400 bytes
SHA-256: 2081c3ffa5835e55b58e2306f3160f07bd213445332b1bacb58a4d0805809ec9

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