Malicious PDF — malware analysis report

Static analysis result for SHA-256 b458db1fad359569…

MALICIOUS

PDF

80.5 KB Created: 2021-04-02 05:05:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: a8cdc597969bff2fb3c7111b82db6253 SHA-1: dbb6cbc4bc72387b09480a2c318757726bafeda3 SHA-256: b458db1fad359569873fc7cf5c60f1298c066e8028dea320ed996717bcd4cc02
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL points to a suspicious domain, suggesting a phishing or malware distribution attempt. Although no scripts were extracted, the presence of an external URI and the overall malicious classification strongly suggest a phishing attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/123?utm_term=bora+stankovic+uvela+ruza+pdf PDF link annotation
    • https://cdn.sqhk.co/wufevinek/4hfxLhi/zuwuguzoritibusixobufo.pdfIn PDF document text
    • http://fosuzapaf.22web.org/bemelizekipif.pdfIn PDF document text
    • http://moxokivotalunuz.iblogger.org/guided_canoe_trips.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387242/normal_6006ea9513296.pdfIn PDF document text
    • https://cdn.sqhk.co/vugomupuzisa/jgiijdQ/vetidedurutig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481540/normal_603fa54359f12.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/lupuvogotog/delta_jointer_37-190_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fcb1e15-3769-45b2-9a04-9e8991e0decb/how_to_turn_off_car_alarm_without_remote_or_key.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/donijuviwamozuwakop.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/disney_family_feud_game_box_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/42794638919.pdfIn PDF document text
    • https://s3.amazonaws.com/sukedil/out_of_office_automatic_reply_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec8b5cd6-34b3-4c22-8237-8e6238b6f81b/what_is_the_most_dangerous_place_to_live_in_new_york_city.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/birmingham_city_council_report_repairs.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7AA 5372 bytes
SHA-256: 5a6ebf913837e099f88fa081f94266ffd5133f812f98211195695675b20fdd8b
font_01_sfnt_off0000ea15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA15 18064 bytes
SHA-256: 8bfa1b83a88dbd55b81994a57f168f07824603357ecfab59ed679dad989a23c0
font_02_sfnt_off00011e25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E25 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd

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