Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6feaa199c4c209c…

MALICIOUS

PDF

85.3 KB Created: 2021-08-17 17:01:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ac4db5ca8ed3a50254ffd94f1325b7ae SHA-1: ea0059f7388bfac447e16d63e3b9922e9973c82d SHA-256: b6feaa199c4c209c656473a2dfb94fc179ed3e052206f7ed336e411b0fd6df39
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of an advance-fee scam. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting an attempt to redirect users to malicious content or phishing pages. The document's structure and embedded URLs strongly indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://oniceh.ru/uplcv?utm_term=how+to+setup+hp+laserjet+p1102w+without+usb
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160f051be0fd84---xesagirufiburugejowig.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084634fc9476---60670071991.pdf
    • http://afghansolar.com/userfiles/file/kulewipa.pdf
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/d6f827971db33bc0eb17db834a19d17d/49505120520.pdf
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/2ec32f0fd9a6ab751ce4aafe846bdafa/rukelowopesokalujibut.pdf
    • http://nuraski.pl/wsg/userfiles/96557939601.pdf
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/16073bc1620db4---sadorivedun.pdf
    • https://techson-cctv.com/upload/file/18962833160.pdf
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd18a49d374---debur.pdf
    • http://bielle-srl.com/userfiles/files/zuzugivuwujawomedatomer.pdf
    • http://architettoannalisatinelli.it/userfiles/files/86540656800.pdf
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a00d94a5b1---69670954095.pdf
    • http://primaria-ciocirlia.ro/media/file/jemidodemidugexev.pdf
    • http://promador.pl/userfiles/file/guvazudafovewojaxonem.pdf
    • http://bannermaul.com/userData/board/file/17580733941.pdf
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084aeae0b6d4---tisevurukotawaxobobepa.pdf
    • http://aceonlinementors.com/userfiles/file/602629102.pdf
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c9b5d10a858---94805869537.pdf
    • http://elfobchod.cz/foto/Image/file/14506717590.pdf
    • http://przychodnia-felinskiego.pl/uploads/editor/file/68128389198.pdf
    • http://avstralianature.ru/ckfinder/userfiles/files/96255561713.pdf
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098b27f46153---39986572439.pdf
    • https://sokolzgierz.pl/web/uploads/files/39463957901.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://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_off0000e607.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE607 16792 bytes
font_01_sfnt_off0000fe1e.bin
9bad2b80e01a9a8d0c35f54ede0aeb3084414c35d39741c9effbe2070434b9e7
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE1E 10988 bytes
font_02_sfnt_off000117a3.bin
b27b4e44448d100699d885ffe7bef11c55bac99c021a7af267fbbd17e090983c
pdf-font-stream PDF embedded font (sfnt) at offset 0x117A3 17132 bytes