Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b87ea894bfada5e…

MALICIOUS

PDF

76.8 KB Created: 2021-03-14 05:30:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ca2769d4253832d0a8cd8e285e2d7f3 SHA-1: 2bf36cf6706c71a44abcdffbef0fe35005409003 SHA-256: 7b87ea894bfada5e8084406adebdb16ef73549fce6709ec51e9baefe0a2bfcc0
96 Risk Score

Malware Insights

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

The file is a PDF document detected as malicious by ML classifiers and ClamAV. It contains an embedded URL pointing to 'https://bologen.ru/wix?keyword=shoe+repair+shop+near+me+open+now', which is likely part of a phishing or credential harvesting scheme. The document body is heavily obfuscated, but the presence of the URL and the malicious verdict strongly suggest an attempt to deceive the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/wix?keyword=shoe+repair+shop+near+me+open+now
    • https://static.s123-cdn-static.com/uploads/4418587/normal_5fe45a47c2914.pdf
    • http://sekujirimabasas.getenjoyment.net/articulation_and_phonological_disorders_bernthal.pdf
    • http://jaraxusej.iblogger.org/income_statement_spreadsheet_free.pdf
    • http://zupejuxe.iblogger.org/49956340670.pdf
    • https://cdn-cms.f-static.net/uploads/4368227/normal_6046df30269ab.pdf
    • https://static.s123-cdn-static.com/uploads/4369185/normal_5fdce1ad2fe20.pdf
    • http://bubuwem.iblogger.org/chefman_sous_vide_manual.pdf
    • https://cdn-cms.f-static.net/uploads/4368745/normal_604500570f4c6.pdf
    • https://cdn-cms.f-static.net/uploads/4368788/normal_602e375629c09.pdf
    • https://static.s123-cdn-static.com/uploads/4455916/normal_60060126e71f3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a0bf7912-7d5a-424b-847e-51b4fb3d2a39/82360686188.pdf
    • https://uploads.strikinglycdn.com/files/cfc344c2-013e-413d-b8e9-f0aaba556067/73320930131.pdf
    • http://bilixovat.rf.gd/imaginative_realism_reddit.pdf
    • http://biwosagamivi.myartsonline.com/surge_arrester_calculation.pdf
    • https://91506351-5699-48ce-85e7-8e7d071f4e87.filesusr.com/ugd/d775a9_3633659f2e234bf4b9bb4e149db8ea3a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/324ef906-0ced-41e9-a281-c165d70c676e/91925665531.pdf
    • https://uploads.strikinglycdn.com/files/efb7e16e-e555-4c64-a3fa-02b9d726fcf0/can_you_make_banana_loaf_in_a_bread_maker.pdf
    • https://bc732cde-fb09-4fee-8ab5-c82a45a1131b.filesusr.com/ugd/2ac701_0926d9016b8f4c22955173a4d501c913.pdf?index=true
    • https://d1897088-ef6e-4b60-8303-910b4b551fc1.filesusr.com/ugd/4cfbbd_f2df168cc8764daf98f3923c0c74fbf4.pdf?index=true
    • https://uploads.strikinglycdn.com/files/0a4d5485-f191-4cbf-8b5c-f4d9c6a405f9/tusefujodivasozan.pdf
    • http://valogaberel.rf.gd/rasotelezubeki.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_off0000ef27.bin
3e4e91a55eb012c817d3060f029e7526f1e1941486085f37e3536fcb52bc0717		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF27 5220 bytes
font_01_sfnt_off000100c6.bin
e9c578280b8687571f0b41135c6a63abfcbc4003839a9e73988810559713b47c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100C6 10892 bytes

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