Malicious PDF — malware analysis report

Static analysis result for SHA-256 682b368125a2568e…

MALICIOUS

PDF

186.1 KB Created: 2021-07-07 22:58:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 0d56c4b620c03220f623a78f7a0c63fa SHA-1: 389e0a0b1721e95c6bdd6e73e584c112c6d704a1 SHA-256: 682b368125a2568ea2c37c865ae7a8974421aa171076e632bd93360900322475
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many pointing to compromised WordPress sites, and a link farm structure designed to redirect users to external sites. The presence of these links suggests an intent to direct users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

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=penny+wise+pound+foolish+quotes PDF link annotation
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/o4i6bnjothb384rmq0ourdln9p/99689078246.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/a4ubl1i0tifsgk41sgm7omeikk/pasajugusujetejafupolopax.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/8922a4c255a868ace70331d7403d3e94/bubabek.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/f3b5fc457c19313a5da30b89a17a9ece/numet.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/9abded73399815a423505af3194156b9/nejuwatabogepotewisikuj.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/2b222a1f81bca4b17acb828ee351e80a/kepimerizebegevi.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/27cf2c2d778d82af054d1c2f90717e8c/7799814010.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/ed3d48cd259ed40e596b7192b8a21d4d/kilipodu.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/das5seo6lhnjkre29ko728dft1/biwalixaxarukomazomeso.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/78bd36d1c85003de372dc951e0bdb4f5/revamovu.pdfIn PDF document text
    • http://okmarin.ru/userfiles/file/pugamujuvesusimi.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/5350e6afbe1dfc8d25c1900083a3cb58/84630047531.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/d6r4o4qeu0ofersl3gngcu68cu/35360594402.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/96454218994.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d19d0e71fc---91664274390.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095cbafe9ba1---54059604052.pdfIn PDF document text
    • http://shethof.ch/cgi-bin/dynamisch/file/kotuxisizuten.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/d80f6c1e15007717720a42155db8febf/20907869591.pdfIn PDF document text
    • http://kondicionery-lubertsy.ru/upload_picture/file/pajevatip.pdfIn PDF document text
    • https://myarchitect.es/ckfinder/userfiles/files/pogetulevozozuwa.pdfIn PDF document text
    • http://cgpreceptor.com/ckfinder/userfiles/files/7782143210.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/9d8c2d564fffd3b300703775c186b207/ridaninefurenulofudenave.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_off0002780e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2780E 10780 bytes
SHA-256: 05d8647ce16af41ebdd742f770a6df150ee129b3d44a489180d1130e2e84f1be
font_01_sfnt_off000290ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x290AC 18640 bytes
SHA-256: 18c466a4a0e8ce50c71224df902449c18ed2b836aa28f5adae65c40b52107cb1
font_02_sfnt_off0002c0d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C0D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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