Malicious PDF — malware analysis report

Static analysis result for SHA-256 e95bb5f4ebb58cdc…

MALICIOUS

PDF

60.6 KB Created: 2020-12-17 10:53:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: cd0cfe999ec386c25e23e4650b790eb9 SHA-1: 723873e08bb9c0a1689874cab8a29b9acc30fce5 SHA-256: e95bb5f4ebb58cdcf825336671153fe402911b85e16b8a767ba4d54a3cee6b8d
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one heuristic identifying it as a potential link farm. The ClamAV detection and ML classifier strongly indicate maliciousness, specifically a phishing or trojan threat. Although no scripts were explicitly extracted, the presence of embedded URLs and the PDF structure suggest an attempt to redirect users to malicious sites, potentially for further exploitation or credential harvesting.

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://trafftec.ru/strik?utm_term=shark+iq+rv1001ae+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368977/normal_5f93567c75b08.pdfIn PDF document text
    • https://daniveledize.weebly.com/uploads/1/3/4/9/134900130/6365524.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382192/normal_5f9e8b094398a.pdfIn PDF document text
    • https://fikosaxan.weebly.com/uploads/1/3/4/7/134753192/4593757.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/5fc53c14116eb00e3c6863a8/t/5fc9c4ab81b71b408595fdde/1607058604541/townsmen_6_free_mod.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc17973bf71053ccb1438e7/t/5fc558eff81c9a2a0c55481b/1606768879622/pokemon_magikarp_jump_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/planet_zoo_crack_only_password.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c3aad26ff1194f72fc70/t/5fc19a7761e25426e1749323/1606523512937/21062191496.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16718312-edca-43ba-8fe5-c50c3cc1523a/xijejadixakonogutev.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3624192c50b1a1e875bab/t/5fce20dad235d37878ee1194/1607344346435/gps_speedometer_with_trip_meter.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf53423485235c86bd32a7/1606374211166/matlab_guide_slider_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80af315d-61d5-42b9-b00d-dd85058ba328/general_chemistry_principles_and_modern_applications_solutions_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/90130426724.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_off0000b49d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB49D 5296 bytes
SHA-256: 8ac00a70bd48b66f3bd04ebeb4643c071045e504024e16f56f5cea7bb3318e74
font_01_sfnt_off0000c684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC684 9184 bytes
SHA-256: 8e89995b5d6aad9923a319c7b110efa377385bec75f33ee3ae4195983b6a1a83

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