Malicious PDF — malware analysis report

Static analysis result for SHA-256 62342fdb36261a50…

MALICIOUS

PDF

67.2 KB Created: 2020-12-05 16:43:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 5b340fd674733335ab5825189bf02fa9 SHA-1: 7948cb91c010de4b4a315d96a3897bc365e8e753 SHA-256: 62342fdb36261a503563d980a54f4a9d8922440b17f44b1b9134b0e94b426484
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM'. The primary malicious URL, 'https://traffset.ru/strik?utm_term=senora+en+ingles+como+se+dice', suggests a phishing or malicious content redirection attempt. While no scripts were explicitly extracted, the PDF structure and numerous external links indicate a likely attempt to redirect users to malicious sites, potentially for credential harvesting or malware delivery.

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://traffset.ru/strik?utm_term=senora+en+ingles+como+se+dice PDF link annotation
    • https://jemewifawoboxe.weebly.com/uploads/1/3/4/8/134872293/025791c817.pdfIn PDF document text
    • https://deruwatago.weebly.com/uploads/1/3/4/0/134096830/gemoze-femumuvixa-korowabe.pdfIn PDF document text
    • https://megogolu.weebly.com/uploads/1/3/4/3/134314378/wijatan_xetuz.pdfIn PDF document text
    • https://dekekutema.weebly.com/uploads/1/3/4/4/134440935/xogukekunak.pdfIn PDF document text
    • https://rajofike.weebly.com/uploads/1/3/4/5/134500595/8d83f2bf630.pdfIn PDF document text
    • https://tokenosatavikik.weebly.com/uploads/1/3/4/6/134618571/2218605.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/5fc4de0ebda9c57a97d7936f/t/5fc92ec0f2c87f35e8a3e9cf/1607020225208/xixadaxajop.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc137400b6b03258f37a4df/t/5fc90128850fb626fdf3908a/1607008553058/17808160925.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0e8564a3cc4058a6dd7b/1606225542222/22535080379.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7830239503a47f6fdd30c/t/5fcb0f1036758319a54c7a0e/1607143185300/49211054106.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2f09fe2fce462bc994906/t/5fcb626a6e74d26c6ffe3b9e/1607164523572/1622922503.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc573b08787e879898a92f1/t/5fc7d6d5d9e12858b4055dc2/1606932183062/vida_health_glassdoor.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc588470b6b03258f54bdbe/t/5fc74eb1788a962b7c2cdd65/1606897331259/onedrive_login_error.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5968840f1034a5cc8ba68/t/5fc778a41d106d256bc43983/1606908069900/10685364479.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_off0000c7f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7F2 5364 bytes
SHA-256: bc7dbf0ca9a8b716e00056cd5b286c3025dd1c1d0c6fa7e4b377c8951906f463
font_01_sfnt_off0000da15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA15 11548 bytes
SHA-256: 2f32d98ca7e627767156484feef734a7913c5b575b9725c9cf699b94f99b7498

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