Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f9feb8cf720dd5f…

MALICIOUS

PDF

84.2 KB Created: 2021-05-29 03:13:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: cc030b6fbf82555a755398e45b76c3c0 SHA-1: cce9903b206563ada16d91dfc89d8fa756c4e956 SHA-256: 6f9feb8cf720dd5f15260667f3fb77e3238b64bf0ab32cc29a8fc7a17dfff979
104 Risk Score

Malware Insights

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

The file is identified as malicious by a ClamAV detection and an ML classifier, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'bologen.ru' and a heuristic for a visual download button suggests a phishing or social engineering attempt to trick the user into downloading a payload. Although no scripts were explicitly extracted, the PDF structure and the nature of the detected threat (Pdf.Phishing.Trojan) strongly imply an exploit or redirection mechanism within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bologen.ru/strik?utm_term=bittorrent+for+ipad+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4477630/normal_6056cd6195f76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456135/normal_6026d0fd40b14.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383915/normal_5fcea6e0c0616.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393349/normal_6028b309d2c9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405642/normal_605c22b1c95a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417023/normal_5fd322401ec08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386365/normal_5fd7918f17bcc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465709/normal_6062007c70289.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415740/normal_5fcdc82182188.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421627/normal_601f1b37f34d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471474/normal_6044f8623d75e.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4403808/normal_60b06f38125d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425723/normal_606677a79a1a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490138/normal_600ab18e63d23.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489732/normal_5fc85c3758751.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/61fc9881-2230-4f04-925a-88fedff5b1bc/army_drill_pay_calculator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55bad862-c8bd-472e-9cce-3fe348e29d79/historia_universal_contemporanea_5to_semestre.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/167107fc-06ca-4e76-8d1a-44c388a6569b/how_to_prepare_for_oracle_dba_interview.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26a0c11f-8d91-4e34-83e0-c900e1ad528e/lefemosa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fc6aa1f-b310-4cb5-ad7c-300e4a0d9a5f/52710786483.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67b0289a-7b84-49c2-be11-9470ac667195/96941742907.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_off00010d3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D3B 4996 bytes
SHA-256: 5de683770facee98870d465de278d42e007d36eb4efea003cbcd31080bb21a25
font_01_sfnt_off00011e5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E5F 10948 bytes
SHA-256: 95da9c45e32311ad354ddffa42daaa60680cc745364cf6ced60da3f851b307e2

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