Malicious PDF — malware analysis report

Static analysis result for SHA-256 15575a1842f62b76…

MALICIOUS

PDF

87.7 KB Created: 2021-09-13 23:05:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f0de3cd2628248b414256a8f131afe93 SHA-1: 546a429f891b4699056028b88aacda3c32220ff6 SHA-256: 15575a1842f62b76aec76c07c202d66bb663458ad1793eccc35ff1c7f029aa6c
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged as malicious by ClamAV and an ML classifier, exhibiting characteristics of an advance-fee scam. The document body is heavily obfuscated, but the presence of numerous embedded URLs pointing to PDF files suggests a lure to download further malicious content. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly indicates the document's intent to defraud the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.
  • 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://mirrorlink.com/public/files/files/buzax.pdf
    • http://polyacer-ecp.com/userfiles/files/20210912_110705.pdf
    • http://avsa.org/sites/default/files/images/files/80179943229.pdf
    • http://funagamex.vn/PhuongNamGroup/userfiles/files/lawetekasezixiluzisukebu.pdf
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613be01327cdd---wolowogaluvarevezaxe.pdf
    • http://sanyosushiglendora.com/uploads/files/45464530927.pdf
    • https://ost-fogging.com/upload/files/fibugirabisusarero.pdf
    • https://nationalshield-uae.com/userfiles/files/87807610930.pdf
    • https://jaukiaplinka.lt/ckfinder/userfiles/files/basetezolopamitomovizum.pdf
    • http://ps-chiptuning.hu/userfiles/files/49581921830.pdf
    • http://jhdjt.com/images/upload/File/voguzake.pdf
    • http://surtek.biz/image/files/20150323_151722.pdf
    • http://gro-felix.si/uploads/ruwubositizoluzud.pdf
    • http://www.accl-calibration.com/login/ckfinder/userfiles/files/25331277174.pdf
    • https://cakesandcupcakes.net/userfiles/files/25267905694.pdf
    • http://pnktools-th.org/ckfinder/userfiles/files/fajiludower.pdf
    • http://malagi.pl/user-files/fck/file/wijov.pdf
    • https://ashasuchikala.com/ckfinder/userfiles/files/zixikodusivira.pdf
    • https://bestrecycledautoparts.net/images_i/file/turixuruxawupenatalegup.pdf
    • http://mybyblos.com/userfiles/file/zojubedasurazawuzod.pdf
    • http://ranjitabiswas.com/userfiles/files/tifatu.pdf
    • http://bodybybodyology.com/ckfinder/userfiles/files/86086678941.pdf
    • http://terrietanaka.com/library/files/49720906894.pdf
    • https://penzion-pod-rozhlednou.cz/img/file/182530280.pdf
    • http://damutech.kz/upload/2021/09files/210914013500071791o7gj0.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=the+code+of+the+extraordinary+mind+book+pdf+free+download
    • 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://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_off0000ec91.bin
90e58026bc580904621cd44263766c72af473653d3c15ea8632461486230bb2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC91 18916 bytes
font_01_sfnt_off00011e0f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E0F 16792 bytes
font_02_sfnt_off00013626.bin
5d483fbca3342ab012658b2e84ccf95e7f88ded4cbbb53aba39163e0af0304af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13626 11216 bytes

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