Malicious PDF — malware analysis report

Static analysis result for SHA-256 89c92825398d8fac…

MALICIOUS

PDF

77.2 KB Created: 2021-02-20 10:24:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7d98a84fa7fe0e1bd0f19500228e2c11 SHA-1: 969b33cfb1475ca7588daa50f28d6f578388105c SHA-256: 89c92825398d8faccff0a7b2b5521ba360cc8f0e5c42969804f823729297d38c
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, suggesting it is part of a phishing or malware distribution campaign. The document body, though obfuscated, references a worksheet, likely a lure to entice users to download further malicious content.

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=adjacent+angles+worksheet+4th+grade PDF link annotation
    • http://smirno.life/98903503621ytzn8.pdfIn PDF document text
    • https://cdn.sqhk.co/lezubenewago/est0MzA/gafesiseg.pdfIn PDF document text
    • https://cdn.sqhk.co/nazopekujavi/oghfhi8/change_color_of_image_photoshop_app.pdfIn PDF document text
    • https://cdn.sqhk.co/mulepava/V65M2gf/battle_royale_all_seasons_wallpapers_skin.pdfIn PDF document text
    • https://cdn.sqhk.co/xutazazo/tUvigyz/subway_surfers_world_tour_list.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393632/normal_602738950f119.pdfIn PDF document text
    • https://cdn.sqhk.co/kipezipilojo/dhhXjjS/90293995062.pdfIn PDF document text
    • http://copyrightnotices-form.com/26823918827whrp7.pdfIn PDF document text
    • https://cdn.sqhk.co/pirujezexod/2sEFPAv/simsimi_bad_words.pdfIn PDF document text
    • https://cdn.sqhk.co/fiporalisu/5Xjidje/41235876860.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368953/normal_5fdeabf38ec67.pdfIn PDF document text
    • https://cdn.sqhk.co/nilamemiw/kJiecVp/animals_names_and_sounds_in_english.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367007/normal_6006e26e9013d.pdfIn PDF document text
    • https://cdn.sqhk.co/teposodigar/icOhcie/zombieland_saga_wiki_sakura.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500429/normal_600ddeebef682.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopaji/jcBJjje/driving_school_2017_hack_all_cars.pdfIn PDF document text
    • https://cdn.sqhk.co/fusojafiza/39Phfgg/speedy_cash_for_loan.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/posufij/16384693966.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/nekotokuvowilazafaw.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/kazepurobupuvi.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e46a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE46A 5248 bytes
SHA-256: b2b44a7ff9e2bf872b637323cd75b137bbaa23d004f8496935c1f591a325c2d4
font_01_sfnt_off0000f657.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF657 10212 bytes
SHA-256: f29ba1e30786c91963fcef54cc72b6a47903eeb92848ba691a5fbc18169416ff
font_02_sfnt_off0001195c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1195C 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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