Malicious PDF — malware analysis report

Static analysis result for SHA-256 468b50be449e02dc…

MALICIOUS

PDF

75.9 KB Created: 2021-09-15 03:33:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7201aa810f257f2973e1a6521fcf2a11 SHA-1: 99a9b5f17edc37a15e8ae2f7cf44ee076263bb7f SHA-256: 468b50be449e02dc9dc0d546da3051e928baa58c5af187cdd59fa73c98946bbc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. Numerous heuristics indicate the PDF is a link farm, with many URLs pointing to compromised WordPress sites or disposable hosting. The document body is heavily obfuscated, but the presence of embedded URLs and the overall structure strongly suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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
  • 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://drafthe.ru/uplcv?utm_term=iphone+airplay+to+android+tv
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130bbef77b49---reravudojopajafobubo.pdf
    • http://becskeicsodajo.hu/admin/fck_upload/file/felupugotumivij.pdf
    • http://lor-rostov.su/userfiles/files/susuvunogujupevamuvolu.pdf
    • http://anthonyvienna.com/sites/default/files/file/16092333355.pdf
    • http://architects-desk.com/uploadsfile/5441356294.pdf
    • http://modra-skola.cz/userfiles/file/bamawolokodukipuzezip.pdf
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/tsvdrpuflkrbdmnnim9r06im22/7961972908.pdf
    • http://mbjarrahi.com/UploadedFiles/New/file/82778906513.pdf
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/161413b4fd1c6d---98177286233.pdf
    • http://123podkrovie.sk/editor_uploads/files/bewavobobovijokukamiba.pdf
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/kcem19bvgo18sj6aid0cdlioi5/wugunib.pdf
    • https://kontiko.com/ktkweb3/images/upload/files/60997228872.pdf
    • http://aromata.ru/upload/files/76123507437.pdf
    • http://newtarrytowndeli.com/uploads/files/55274675840.pdf
    • http://lacasedescaraibes.fr/file/90789688465.pdf
    • https://czus-lukasa.sk/userfiles/file/jinomabovajaw.pdf
    • https://www.cifphosteleriayturismo.es/ckfinder/userfiles/files/40248970294.pdf
    • https://globalmediaminds.com/uploads/files/silowuwadizodoti.pdf
    • http://knx-shop.ru/admin/ckfinder/userfiles/files/faxodepovego.pdf
    • http://www.urbanwaterways.info/files/51803520416.pdf
    • http://diakmelo.hu/ckfinder/userfiles/files/64342481475.pdf
    • https://lotusmarinevn.com/upload/files/18274741806.pdf
    • http://hotelamadeustorino.com/userfiles/files/nizudarotinekonajirumu.pdf
    • http://kdekdyjak.cz/data/50734485195.pdf
    • http://vhz.cz/user-files/solomimejapulokewolopazif.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_off0000befc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xBEFC 16792 bytes
font_01_sfnt_off0000d70e.bin
917445234ae8b6b4786a88a14afeec1f1eb95c8c2d30f650cb2d859e08dfe863
pdf-font-stream PDF embedded font (sfnt) at offset 0xD70E 19832 bytes
font_02_sfnt_off00010a7e.bin
86bb304291d6d5c29c5160d604cb633557059d892e5e8f56efc21031c2833d0c
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A7E 10452 bytes