Malicious PDF — malware analysis report

Static analysis result for SHA-256 d484dc199be10e05…

MALICIOUS

PDF

82.7 KB Created: 2021-03-14 04:41:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c4a408cd214c1a3f3022550d319e674 SHA-1: 1afe48a06f563885243ed3fb507b7114379f4510 SHA-256: d484dc199be10e05ea496feca0496390e4ef95a7461f980f37410cc9b7f227e7
134 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with high confidence. It contains numerous external URLs, many hosted on disposable domains, suggesting a link farm or phishing lure. The PDF structure and embedded URIs indicate an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://midufefew.ru/award?keyword=arithmetic+book+by+rakesh+yadav+pdf
    • http://jisutuxoxaza.medianewsonline.com/what_is_the_best_jetted_tub_cleaner.pdf
    • http://euroshopme.site/61564291700a9ld9.pdf
    • https://cdn.sqhk.co/zunezafi/jWicagr/acadian_driftwood_sheet_music.pdf
    • http://intekzafast.online/mipodelugotude6gkd4.pdf
    • http://itayoga.space/xozidofiresibiwasamaraxanm7ppb.pdf
    • https://cdn.sqhk.co/jusulikipe/aiguEP6/31210973840.pdf
    • https://static.s123-cdn-static.com/uploads/4368740/normal_5ffe18103b679.pdf
    • http://fitokaps.xyz/philips_norelco_1150x_46_shaver_61008o099.pdf
    • http://polobasopika.mywebcommunity.org/how_to_unclog_a_badger_500_garbage_disposal.pdf
    • https://cdn.sqhk.co/duzupafuj/hg9gjaa/roxunemurerigewalu.pdf
    • https://cdn.sqhk.co/gilubibawi/NhhdShd/80976923478.pdf
    • http://kitafoged.medianewsonline.com/algebraic_expressions_and_identities_class_8.pdf
    • http://rakapugijumub.sportsontheweb.net/simawivef.pdf
    • https://cdn-cms.f-static.net/uploads/4388276/normal_6019ba866ec8a.pdf
    • https://cdn.sqhk.co/sabiwizi/ihToohi/34598051261.pdf
    • http://fishing-rods2.club/organizational_culture_lecture_notescetbn.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tudugir.atwebpages.com/pdf_annotator_7._0._0._702_crack.pdf
    • http://xovolefewawex.atwebpages.com/jafadon.pdf
    • https://uploads.strikinglycdn.com/files/1c1e8067-717d-44ba-803e-723052c0066f/how_to_get_a_truck_driving_job_with_no_experience_in_australia.pdf
    • https://uploads.strikinglycdn.com/files/28351773-f6fd-4722-979d-05c70c686ea4/58048116782.pdf
    • https://uploads.strikinglycdn.com/files/4a320f3b-f3f1-4a8e-8109-c257bfde36a5/dobipi.pdf
    • http://sajulugebimisu.myartsonline.com/what_type_of_volcano_is_a_caldera.pdf
    • https://uploads.strikinglycdn.com/files/a18bfb87-d21f-4ad9-9534-98e78db29187/waguxifo.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed2b.bin
a36e458c0aca831dbb322cc49e7bb5d280ea3971911a336cf7017f7b69a770f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED2B 5716 bytes
font_01_sfnt_off00010082.bin
42fdeb1a60d480c8ba0014792a9997c4349097fbf9907c44abcb3fc95a9ba39c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10082 11396 bytes
font_02_sfnt_off0001276d.bin
e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1276D 16164 bytes

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