Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8ba35c18f5b3235…

MALICIOUS

PDF

82.3 KB Created: 2021-03-15 11:32:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd6657e0eef49b94be838551948a247d SHA-1: d537a4614805b60933d647265db082aa8443a97e SHA-256: c8ba35c18f5b32351e25ad360c4ea2e4988bbaca1e68b1a0d027aa8c3533e73e
96 Risk Score

Malware Insights

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

The PDF document contains an embedded URL that masquerades as a search result for "best product management books 2018", likely intended to trick the user into visiting a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, and the presence of embedded URLs points towards a phishing or credential harvesting attempt. No scripts were extracted, but the overall structure and URL suggest a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://vilenefex.ru/strik?utm_term=best+product+management+books+2018
    • https://cdn.sqhk.co/tororukiwuri/FhbSjij/84383774407.pdf
    • http://lady-bug.club/11879974247lgodf.pdf
    • https://cdn.sqhk.co/tiwefuxab/dijym92/infectious_disease_specialists_colorado_springs.pdf
    • http://zanartcc.net/anime_boy_paint_by_numbers_kitxbrkg.pdf
    • http://natasisenexu.22web.org/satire_in_a_modest_proposal_worksheet_answers.pdf
    • http://stopro.store/12534938802jenci.pdf
    • http://fokefetebebinin.66ghz.com/18069610613.pdf
    • http://dostafood.xyz/71748048544b3rd1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/66062976-499a-4b04-b5e6-c38aecb4a378/fujitsu_fi_6130_scanner_not_recognized.pdf
    • https://s3.amazonaws.com/voxulija/xuxejetufawebuxumalejapa.pdf
    • https://uploads.strikinglycdn.com/files/eb5497b8-682e-4b89-b001-d0b1be09ed5b/faxirosawa.pdf
    • https://uploads.strikinglycdn.com/files/f7244515-8e79-41d0-ab73-45e5aa251dab/jasopet.pdf
    • https://uploads.strikinglycdn.com/files/18c78754-1335-4184-a40d-383f1cced04b/nagepud.pdf
    • https://uploads.strikinglycdn.com/files/c81006e4-2340-490f-b02b-28877d7e0672/literature_review_on_leadership_theories_sultan_aalateeg.pdf
    • https://s3.amazonaws.com/roxawo/soccer_match_poster_template.pdf
    • http://lagidifej.rf.gd/exclusive_management_agency_agreement_nsw.pdf
    • https://s3.amazonaws.com/lodazojamuva/development_of_sociology.pdf
    • http://fubegamo.epizy.com/how_to_pair_a_kenwood_rc-m1824bt.pdf
    • https://uploads.strikinglycdn.com/files/f285fa05-a6cf-47a3-8770-ea43977288e8/36769644679.pdf
    • http://tidosanivowevez.epizy.com/zixipawuzizab.pdf
    • https://uploads.strikinglycdn.com/files/c3ffc6cd-c389-4229-b298-ab431dd42cc4/40345239298.pdf
    • https://uploads.strikinglycdn.com/files/fd26fc47-4e81-4842-88b3-6ad2981454d1/how_to_iron_on_embroidery_stabilizer.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_off0000ffd8.bin
1d678e46f3e22d21cc3c91a47cf66f4a3622635bf9748a1785c3576e1e328606		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD8 6136 bytes
font_01_sfnt_off000114a0.bin
ef7d389cd26631fe8abc2f1bb1e6935ac552638fe6a61116812b39e1c78e51b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114A0 10868 bytes

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