Malicious PDF — malware analysis report

Static analysis result for SHA-256 886b33086118d9e9…

MALICIOUS

PDF

120.0 KB Created: 2021-07-06 21:33:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d1a9984259d9ff1a71d6ab8d48bdb213 SHA-1: 128906b84debbc28fc59f3bf2fab1983609375a8 SHA-256: 886b33086118d9e9ac859644daa581aa5c40d58bd207bf7cfcf6a348bf3486a7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or malware distribution attempt. The document contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure point towards an attempt to exploit users by directing them to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9858

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
  • 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://pistant.ru/uplcv?utm_term=explain+one+reason+why+being+a+responsible+citizen+is+necessary+to+live+in+a+free+society
    • http://ylgems.com/file_media/file_image/file/mubuvalokabokimuvexid.pdf
    • http://meble-tk.pl/userfiles/file/mabinabavugajasufalaba.pdf
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b1182391331---501173671.pdf
    • https://batdongsandothanh.vn/luutru/files/60237736720.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f1245c1754---10167598810.pdf
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093a6ff23e5c---jexewifidaditowoguxuxo.pdf
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085328ed4d26---refival.pdf
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076fa4e16f64---peven.pdf
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073201863bca---12690970133.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/42feea3f1c5ec73c4c3d376d1b7fbae3/pofamizabobubazudogomu.pdf
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/48aed5949e05d1eff0ce9248e60a66b1/90116235112.pdf
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609416f292d55---fedevodubavogadukis.pdf
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160874c7cb17ea---xabomigin.pdf
    • http://libertyquad72.fr/userfiles/file/6748212435.pdf
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bae37598df3---27879671779.pdf
    • https://vibangnhadat.com/uploads/files/boveguxejebug.pdf
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/lf0hmlom2k9qh9g8soc334sdto/kowazex.pdf
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097d3f3ca285---bibuzogenanumurumetunu.pdf
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607943b361f09---wiled.pdf
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a61c0a316be---2971583210.pdf
    • https://havanic.com/cache/fck_files/file/15083647050.pdf
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c5d9642ed---61240699226.pdf
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c92e3b77a88---82133144333.pdf
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b21d8b1ab8f---55849263977.pdf
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/gqkc3f73cabhjj09hi9lflfcc6/kilepubaremuxuwimarol.pdf
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16092c94a65ea0---ganikuravajujebozanamud.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_off00016af8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x16AF8 16792 bytes
font_01_sfnt_off0001830f.bin
edf43473f4eccbbb700935c0a19e45426b2dd51364f2fe82f0be57aadd4d863a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1830F 11308 bytes
font_02_sfnt_off00019d82.bin
1e025c7f9fff88e3afeb8c1f517cd95904db2907a6b3235eb15a426233de681b
pdf-font-stream PDF embedded font (sfnt) at offset 0x19D82 19896 bytes