Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff23f8fe807d33d6…

MALICIOUS

PDF

79.6 KB Created: 2021-01-31 21:47:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: a421e3bf826fda7fb956ff67bbcbb424 SHA-1: 2c32ab4a7881a7211dd858182164d372c34276e6 SHA-256: ff23f8fe807d33d6a29dcc5dfb72f74ebb271f1feb2db116d4b8170ffb04c8c5
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of an external URI pointing to a suspicious domain, combined with numerous embedded URLs, suggests this PDF is designed to redirect users to potentially harmful content, likely a phishing or scam page. The document body, though heavily obfuscated, contains references that align with common scam lures.

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://leonvi.ru/123?utm_term=purefit+keto+shark+tank PDF link annotation
    • https://cdn.sqhk.co/lilomovetum/AiegeTO/gafivodegiz.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxosutuku/jj6Uhb9/guide_for_worm_io_snake_zone_2020_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/mafokesaxuvi/geZjbib/19760158774.pdfIn PDF document text
    • https://cdn.sqhk.co/kofuvufexo/ibJ4cHe/51133317586.pdfIn PDF document text
    • https://cdn.sqhk.co/zivunegas/y5cicYY/piano_keys_chart_for_beginners_songs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418796/normal_5fe0950dc2e15.pdfIn PDF document text
    • https://cdn.sqhk.co/bilejufikone/fKijajf/92981907377.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450338/normal_5fd8915180d30.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486748/normal_5fc9fa78d8b80.pdfIn PDF document text
    • https://cdn.sqhk.co/javomekoru/xKiepIP/candy_match_games.pdfIn PDF document text
    • https://cdn.sqhk.co/zurosewe/SMUZG1v/10069672207.pdfIn PDF document text
    • http://zathkatow.xyz/bhagavad_gita_swami_prabhavanandaycc9h.pdfIn PDF document text
    • https://cdn.sqhk.co/joxutedunik/iggahgn/end_gift_card.pdfIn PDF document text
    • https://cdn.sqhk.co/pakuvesajuwo/SNJb0aH/kexasufekamakorirexafe.pdfIn PDF document text
    • https://cdn.sqhk.co/lakekomum/gcYNEhb/3d_squishy_kawaii_toy_soft_stress_release_games.pdfIn PDF document text
    • https://cdn.sqhk.co/mowanideju/6xBNs2n/portal_quest_patch.pdfIn PDF document text
    • https://cdn.sqhk.co/pulununese/eidwfV6/susofa.pdfIn PDF document text
    • https://cdn.sqhk.co/savageven/h4Vvjeu/10985273050.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5C 4768 bytes
SHA-256: de4114412d2340135aa3405727fa78f6da09797680abb4ac8e618172e8b5a394
font_01_sfnt_off0000fc82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC82 11444 bytes
SHA-256: c5e899eabcf242610489f404f5b870d760ac8e8f0e2c8ba9bc947425cb942ba9
font_02_sfnt_off00012371.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12371 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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