Malicious PDF — malware analysis report

Static analysis result for SHA-256 bff773d1124c318e…

MALICIOUS

PDF

98.5 KB Created: 2021-02-07 20:27:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: db0445925d7f432913c7377f815beb9b SHA-1: e6298b365d7bbffc0cdea7d04d6e4efaf36c56a1 SHA-256: bff773d1124c318edeefc367c45a436b9a121cd7d57cbe57587311306b8c74b5
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 detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body contains fabricated metadata and a title, suggesting a lure to disguise the malicious nature of the file. The presence of numerous embedded URLs, including one pointing to 'leonvi.ru', strongly suggests the document is designed to redirect users to potentially harmful websites for phishing or malware delivery.

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://leonvi.ru/123?utm_term=marie+yovanovitch+married+to+whom PDF link annotation
    • https://cdn.sqhk.co/kasavakujosi/hgghigj/mind_games_movie_1998.pdfIn PDF document text
    • https://cdn.sqhk.co/xaranoraf/6xuhagj/cook_county_criminal_division_case_search.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419204/normal_600379c68f4fa.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/jgfsjdL/rorawumitepevakuke.pdfIn PDF document text
    • https://cdn.sqhk.co/vazoguzo/8jgfdje/ski_jump_game_download_free.pdfIn PDF document text
    • https://cdn.sqhk.co/rugofufol/1zggjhg/dufuzumomolire.pdfIn PDF document text
    • https://cdn.sqhk.co/gixezovof/ngdgf0q/54833095150.pdfIn PDF document text
    • https://cdn.sqhk.co/wolitobutak/UQtgXcP/furerixu.pdfIn PDF document text
    • https://cdn.sqhk.co/bekutojeke/jhfjeic/15775830388.pdfIn PDF document text
    • https://cdn.sqhk.co/fekawifen/ha5JLic/radiology_salary_new_jersey.pdfIn PDF document text
    • https://cdn.sqhk.co/tavikagisato/jDgdhi0/pudejiwisena.pdfIn PDF document text
    • https://cdn.sqhk.co/salobosemiv/gfKqhaK/58151101783.pdfIn PDF document text
    • https://cdn.sqhk.co/fepixuzutol/6miajcJ/best_slow_rock_love_song_70_80_90.pdfIn PDF document text
    • https://cdn.sqhk.co/vomikigiw/DiimYic/life_is_strange_ps4_platinum_walkthrough.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
    • https://s3.amazonaws.com/gulapore/dimiv.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

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013894.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13894 5016 bytes
SHA-256: 87395a9d08bc2ea2971aeb1c34bb9d538c63137a0a718027197b1ff6f0937921
font_01_sfnt_off0001498b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1498B 10872 bytes
SHA-256: 7d311c5eb9c74db2428c1bf7658f47776db8ea404218c2d916505f9e2789e93b
font_02_sfnt_off00016eb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16EB2 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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