Malicious PDF — malware analysis report

Static analysis result for SHA-256 84ab4e9c41a54f92…

MALICIOUS

PDF

94.5 KB Created: 2021-07-05 15:38:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ce0358296183d10b51ab036d2cd2f50a SHA-1: 390f56941545996a95cc63929f9475a40077ee0a SHA-256: 84ab4e9c41a54f92bb5012e6fb5c64e44648290828a4961392565276134274a4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to potentially malicious content. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of external URIs and link farms suggests an attempt to lure users to external resources, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://huntic.ru/uplcv?utm_term=cameron+county+tax+office PDF link annotation
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608124519d41c---sapagafitusasobedob.pdfIn PDF document text
    • http://954move.com/clients/4890/File/mikekujavunolirivabuwo.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/822c182e6820adf1900e5f3bedd04d67/wukafajexaz.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609bdc4dd60a3---94576130926.pdfIn PDF document text
    • http://khiconghoixuancong.com/Khicong/admin/userfiles/file/jopijonuwijidugugugases.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d2ec7d4a5fe---megagitamuxes.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/o3dldlr3b1afdnjbujadrejbe7/67061776846.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160801ce09eefa---fawabonuduwipirinefemis.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a398eaba362---59687851339.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/16081cc0e41fd6---wolokijalupomudipiti.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c64cf44265b---wotudapazapawiru.pdfIn PDF document text
    • http://cctsjwhs.com/clients/0/08/08395bc9c2b8280888f0dabd04457394/File/31717569519.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/448e897b9f55f468042c67eaed30f678/38766158873.pdfIn PDF document text
    • http://ncdesign.it/userfiles/files/69801607552.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/64180b4e9340c2d47e74c30e4af11270/51464815677.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/43fc830246d21096bb15258ef3b8dca7/jiwujorekimadi.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/87jpldlgd3eqgqli4uq43jt73k/4428500894.pdfIn PDF document text
    • http://gioiacompany.net/images/upload/file/zerizuvojubum.pdfIn PDF document text
    • http://pusancard.com/userData/board/file/35604358254.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160944099b0271---demevibusamebefix.pdfIn PDF document text
    • https://hostingyuvasi.com/calisma2/files/uploads/besesopotided.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a62e15e42e9---19767911526.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/75388722863.pdfIn PDF document text
    • http://1970fchs50thclassreunion.com/clients/1/19/19770213778af891f1b13fa25f964f50/File/69318345737.pdfIn PDF document text
    • https://dm288.rs/slicice/file/72407113376.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf0a035f96---waniposugavojoxiz.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/68b6d0eec840786f3bf0d8957339a4d5/kedazajax.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a28ab04ab2a---bunotifesifuvadi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF3 10632 bytes
SHA-256: 895d36e1caced790e3a62d3b3179227bde92170f7150eac72cf03d7f4000cc60
font_01_sfnt_off00012847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12847 16776 bytes
SHA-256: 298e0c68fffd237827303577314d7c0d953bd565c40eca0930e90c0dd8c06ff3
font_02_sfnt_off00015432.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15432 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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