Malicious PDF — malware analysis report

Static analysis result for SHA-256 cedd9e2b72e8d102…

MALICIOUS

PDF

73.7 KB Created: 2021-05-24 03:16:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: eedf72108d4707bd0f1e78e75c5ad996 SHA-1: 729399bf1e3be6ab5791b6d36dc4f2c5aadbc5e3 SHA-256: cedd9e2b72e8d102495ddc3e5078d746819449cedf02789185594b85824be0c3
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that leads to a domain associated with potentially unwanted software downloads, disguised as a guide for obtaining premium software for free. The document body, though truncated, suggests a lure related to software downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/strik?utm_term=how+to+download+camscanner+premium+for+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4472182/normal_60436f4446aaa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412593/normal_60595cb01700b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401517/normal_6028709c4b341.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391340/normal_5fc5f5b26064d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456132/normal_5fe3813c1e805.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489992/normal_6054db4d4716a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418001/normal_600f5e3ac50f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379355/normal_6027073609e50.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/nuxuduwig.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/uc_browser_for_nokia_3310.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/how_long_do_i_cook_my_turkey_in_the_big_easy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f7b7662-e242-42df-ae7c-c0c3ab3a5c1a/dovekuwexawaji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/290dd58b-5b24-4a4b-9f87-fb473bcea01c/4446726993.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b55277ea-4a3b-4de0-a628-c7cff27266cf/hunter_irrigation_controller_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cacd384e-70d8-4bde-a93a-975298796f5e/shark_navigator_vacuum_cleaner_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31a0ac5c-67b7-4503-8f1b-54eb2bdef035/suunto_vyper_novo_batteriewechsel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d2e47d4-ec63-43fd-95dd-a44d82c424ec/the_republic_lubbock_bus_schedule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/633b7efc-dda0-44b5-a16c-28683ba4b37d/garmin_dash_cam_55_cost.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/pomuve.pdfIn PDF document text
    • https://s3.amazonaws.com/paxunu/bug_s_life_movie_in_tamil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d8c56b4-3c02-4d24-8bec-3d21109490bd/what_foods_causes_fodmap_intolerance.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/how_to_pass_cfa_level_1_in_first_attempt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/404803ec-3932-4756-b625-70ed3f72afa0/knot_tying_for_macrame.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fe0d18c-3826-4c16-bea3-41c90b0cde67/200697299.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/safegigevanenut.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_off0000e14e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE14E 5356 bytes
SHA-256: 55722a913be2a36a56bcf6b3838f1758f19dd26741e64b97d8b507726c6e927e
font_01_sfnt_off0000f37e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF37E 10960 bytes
SHA-256: bd99d2e52db8f78289241376d7aa0521df14b483e703d43e41631a0ba5da54c7

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