Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fa9b31309cc7e12…

MALICIOUS

PDF

97.4 KB Created: 2021-07-05 23:22:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 84527b07332bf0a02d49f09900439e8e SHA-1: eb6915cf92a780ee867e3f815bad0149ddcfa701 SHA-256: 7fa9b31309cc7e123e2094699372925eca2429dd70edfb3df2a0879035f9de7f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs that point to compromised WordPress sites, functioning as a link farm. The primary purpose appears to be directing users to external malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9838

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://laborke.ru/uplcv?utm_term=braised+beef+with+daikon PDF link annotation
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16091c69638795---8675086396.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a84dc78fbdc---rasolotazarunepar.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160784fbc2beb9---kilibujosawex.pdfIn PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/734299c0b0090dac5f874ff85a5cdb73/wafeviriminijagetas.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/f3ngooa7b13u8csdqcqlcu7v03/katopowavi.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd1bec941e---8057799728.pdfIn PDF document text
    • http://marcus-1.com/FileData/ckfinder/files/20210609_3F59839A3B2EC969.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1606f53ee3281f---wodosinelubatexu.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2cdb37ef3---78722273625.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/fd3c52dde40a3011ab6d0ef2ade8e0cd/wenepadexadepesaxedopev.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/e054b8564b7e93d79d6eed83c007ffb7/tubaniretiraki.pdfIn PDF document text
    • http://www.cafeinca.com/img/public/contenido/file/sajoponodonegarolamole.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae62ee32902---19651804728.pdfIn PDF document text
    • https://riolospettacoli.it/filesUploads/file/molom.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607abd97d34cc---39346927734.pdfIn PDF document text
    • https://supportsystemsvainc.com/home/ssvi/public_html/ckfinder/userfiles/files/54389092045.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/9fbfd1cbf23cdec50168296f5dc6ae7b/64011385437.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a061697dd71---89686321660.pdfIn PDF document text
    • http://zonweringnederland.com/ckfinder/userfiles/files/89743357222.pdfIn PDF document text
    • http://cecev.com/stockages/files/doxamedotabuzekumunebu.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/d69fb2b80149e00b07ff06b6492ae459/91120057686.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/donud.pdfIn PDF document text
    • http://ipsgroupjjn.org/userfiles/file/nozapazep.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

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f58c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF58C 16164 bytes
SHA-256: fd494554c7a7a2c4488382a78096c535ff133766c7221992be4f6a58596b2467
font_01_sfnt_off00010afe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AFE 17728 bytes
SHA-256: f4e29a5dce8529ec60f3ce0467b33698f4f13caa4ef70a0f1eb5d916b8208b6b
font_02_sfnt_off000139e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000151f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151F8 10776 bytes
SHA-256: b9f2cd3ab48b8051c15bc86acf2f8a906d097cc27ee0664a4906d470d4462045
font_04_sfnt_off00016ac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16AC9 3156 bytes
SHA-256: e5abaef4d9561088bc09d0a17752016a980e0bb2ad2ec2cd768a95139290e7e7

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