Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bafd218133a9d50…

MALICIOUS

PDF

100.0 KB Created: 2021-07-05 10:09:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 44246c7aa37600f3aa9e3b749a90ac77 SHA-1: 92e5df965b61b033e6423105024551dbde25e44d SHA-256: 9bafd218133a9d501d8b152e53558f4214b82a016ef88114efb31080cf0623f5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting it's part of a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://infrive.ru/uplcv?utm_term=franklin+marcus+theater PDF link annotation
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607273c1e7655---tilizuzojisomotar.pdfIn PDF document text
    • http://neonatal-surgery.ru/userfiles/files/seresorekegarakejefazasu.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf409714ec3---68848823407.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a573c59abf0---doxizuner.pdfIn PDF document text
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/160714a0294db2---48377090930.pdfIn PDF document text
    • https://nocenzura.space/web/img/podborky/files/gebuzamalodozojana.pdfIn PDF document text
    • https://dimensioninteractive.com/WYSIWYGImage/file/turudelivufiwomaxisa.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad820558ad3---98382413217.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084b2802bbbe---navobonituvezowibu.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160ddb8c2cceef---jasigitusobi.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/21a95fb762ab3d06f0cb57dc1117dd0b/jewiwanitusitoxiniwu.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/cor6r30o4eal78mkfb7dp8m2gv/42725009289.pdfIn PDF document text
    • http://ghioroiu.ro/sites/default/files/file/vojeratiz.pdfIn PDF document text
    • http://houstontca.org/Content/uploads/files/52616630298.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/d86d1dfe4f364c49015a1334cbd01416/fonaxerefazezazur.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/7iu5tfo5qb4mlgr7dvgk8g2so1/30634701497.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/dt8rp93kd4dmakv65ifahltau5/delesukumew.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b22ba4b57f6---94947861394.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/gobavuzumubirafu.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c2422d4b399---64929267898.pdfIn PDF document text
    • http://hasici-pristroje-eshop.cz/files/file/suzinuxede.pdfIn PDF document text
    • http://bigandtallking.com/userfiles/file/74060590879.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_off00012388.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12388 10544 bytes
SHA-256: 34c59116a449aed53562917cac3526ae64d788b4aaeb8b7b5b644c3896bae26d
font_01_sfnt_off00013b53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B53 17964 bytes
SHA-256: a485f2af5fa689225f0c29477342ce90b3b729ef0cbecad1bcf62414c459d8d7
font_02_sfnt_off00016acd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16ACD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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