Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bef733dd8335906…

MALICIOUS

PDF

87.0 KB Created: 2021-03-20 05:01:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b4cb0a0122163ec73fef0142f596908 SHA-1: 5db312d14bc1ac6a9c7cb763acff360f7e62f96b SHA-256: 5bef733dd8335906cfb34bab0242e07b2eefd4101f921b9bdcde15a0b30607b9
196 Risk Score

Malware Insights

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

The PDF document contains a heuristic firing for PDF_SEO_LINK_FARM, indicating a large number of external links, and a PDF_URI pointing to a URL associated with cracked software downloads. The ML classifier also flagged this PDF as malicious. The presence of these indicators suggests a phishing or malware distribution attempt, likely using the document as a lure for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://druttle.ru/wix?keyword=spotify+premium+apk+download+cracked+ios
    • https://static.s123-cdn-static.com/uploads/4415334/normal_5ff4ae10d8e19.pdf
    • https://borusolu.weebly.com/uploads/1/3/4/3/134327960/nowobutusifedepiz.pdf
    • https://jezafemobad.weebly.com/uploads/1/3/1/3/131383748/noratiputinebumulu.pdf
    • https://vewejefimubi.weebly.com/uploads/1/3/4/1/134108794/folagesa.pdf
    • https://static.s123-cdn-static.com/uploads/4491173/normal_5ffa21be7ee87.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/81bcd42c-5b5a-45eb-a2f4-d5d6e7e54396/usarec_form_3.3_filler.pdf
    • https://uploads.strikinglycdn.com/files/109fcfc6-2ebd-4c9f-b865-a934fdb918f8/toxenubometuwe.pdf
    • https://s3.amazonaws.com/gulapore/taking_metformin_for_pcos_side_effects.pdf
    • https://17673d3b-e5d0-4e0e-8211-f079fadf35f5.filesusr.com/ugd/13ae68_613e36dc896247879d4f6e855e20a862.pdf?index=true
    • https://uploads.strikinglycdn.com/files/90b48647-b348-4cc6-aa5e-cef72ab34ed6/dudibaraxidazes.pdf
    • https://uploads.strikinglycdn.com/files/2607840f-a0b9-4e7d-af63-008ae746958c/35825259617.pdf
    • https://s3.amazonaws.com/gajakelegeza/66155660107.pdf
    • https://uploads.strikinglycdn.com/files/47103c89-8f8c-4c97-baec-4783040eb567/best_drill_bit_for_metal_lintel.pdf
    • https://s3.amazonaws.com/fakuguvil/44472663305.pdf
    • https://95043331-d9de-4498-ad98-35b8ac3ee23f.filesusr.com/ugd/5740b2_089815eb39d0481cbfd6fdf6c60cff4c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4e6c0e5b-6b82-4adb-a338-d9f8b0aa7de5/33790353775.pdf
    • https://s3.amazonaws.com/vinejivunitego/84076400252.pdf
    • https://8a05da06-75fd-4b4b-8779-f7668a2fa4a0.filesusr.com/ugd/da32d9_87640caffd584924b2980953c4bb9202.pdf?index=true
    • https://s3.amazonaws.com/semuxemakaw/attitudes_to_language_mini_ielts_answer.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000111de.bin
ebf9d3b03b424f50d2ff594b58b8ee84caacba576de86758b3ff6cc1c340c95d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111DE 5664 bytes
font_01_sfnt_off00012530.bin
62b3dcc27e19514a26de0525b66f2f166fb89b6614d4d018a8ac5694173e7593		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12530 12372 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.