Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3bbbfc37eecaa4a…

MALICIOUS

PDF

71.3 KB Created: 2021-06-03 05:55:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 2ac1ce83affbafbd6c6d01fc4bbb2c62 SHA-1: c98c6ce5ec5e51ecba58eb61d029e2a8738aba9a SHA-256: c3bbbfc37eecaa4a88b51d9e26ec0f21efa02b552b2ea2112eb3f81c4f7e74d7
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URL pointing to a potentially malicious domain, disguised as a service manual download. While the document body is heavily obfuscated, the presence of the malicious URL and the overall detection suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cructi.ru/pbw?utm_term=honda+accord+2006+service+manual+pdf+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4411483/normal_603b9d7b64907.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421472/normal_6037f4774e19a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483851/normal_60149d307e899.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446270/normal_5ff42eb381c06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453115/normal_60b8286b1db8c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495402/normal_5fc5d8fa54f2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408983/normal_6020bd515d203.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479673/normal_600916b61e1c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412591/normal_605dd96199416.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pobonagul.pbworks.com/f/38887634156.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/895308f8-5627-4f32-98a6-ddf37f903331/35396493441.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec18d1d8-086e-4337-be78-a8ca23674a62/adobe_premiere_pro_cc_2015_tutorial_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bcb57c8-b607-4eac-ba5b-d5b44d644873/buwazipafuwuxitazefunojo.pdfIn PDF document text
    • http://jevibufile.pbworks.com/w/file/fetch/144543528/bloxorz_unblocked_games_for_peasants.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79c1782a-ba6f-4d63-a6a7-caca5828a902/how_to_reset_coway_water_filter.pdfIn PDF document text
    • http://zeratuwolima.pbworks.com/f/download_harvest_moon_fomt_bahasa_indonesia_gba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15946658-9958-493f-81cc-1666c41a508e/are_combo_washer_dryers_any_good.pdfIn PDF document text
    • http://lagawiwefe.pbworks.com/w/file/fetch/144521337/88331696166.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e910ab5-70ba-49a2-96b5-4810aff6dd4d/how_to_alter_route_on_google_maps_iphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00451312-2fd4-4565-9c29-e5f12bc8d65e/ubee_default_password_spectrum.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_off0000d8a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A6 5844 bytes
SHA-256: fe8e40c9dbf8824229d39822f31d4b78201132c6ab1481ca3bf19017e721fa39
font_01_sfnt_off0000ec86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC86 10428 bytes
SHA-256: 0342634cc80bcae6a78b2b6a14cd49d49e9c7c51678d59849357f3b6a593922b

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