Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d9740f7a958e6ac…

MALICIOUS

PDF

82.6 KB Created: 2021-09-05 10:42:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 6aafe0899d16b1adb71404124691f11c SHA-1: fd0abe53557d5c7c3efc500ad3c9c7b82639b20b SHA-256: 2d9740f7a958e6ac14c70981cc360b6ef847383bcca18dc8624439a397495390
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress uploads, indicating a link farm designed to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://irlanc.ru/uplcv?utm_term=rccg+teachers+sunday+school+manual+2018 PDF link annotation
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/v07snk3vrlil483s7tasrrt651/14737295414.pdfIn PDF document text
    • http://ngocvietbungalow.com/upload/files/nopikofudemaneli.pdfIn PDF document text
    • http://vivaibonomo.it/userfiles/files/47653166229.pdfIn PDF document text
    • http://morethancars.nl/uploads/edytor/file/vazuzofexene.pdfIn PDF document text
    • https://khotelmarket.com/FileData/ckfinder/files/20210619_7114036804547F16.pdfIn PDF document text
    • https://abcoegypt.com/userfiles/files/delexudebawisifativu.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/c9b785fd2ad66aa338aeedb4f2e5dbfb/daxajatopivavazogov.pdfIn PDF document text
    • http://xfswchem.com/upload/files/sipawatad.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/knq9v993tugdpbmiq98o58nja0/38701158247.pdfIn PDF document text
    • http://waetsukai.jp/system/ckfinder/userfiles/files/nifedutelejume.pdfIn PDF document text
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/4ace6ea35be773d2913b4e0a2ec95f10/45318829574.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1020c3e3e7---xanusazotawezata.pdfIn PDF document text
    • http://gapoom.com/upload/fckeditor/file/kobapewitekujevebi.pdfIn PDF document text
    • http://planbmedia.hu/files/savatuni.pdfIn PDF document text
    • http://dabbleanddesign.com/clients/c/c6/c60e280709801842a26e47e23f21f170/File/bedepexemawegimukivosu.pdfIn PDF document text
    • http://raczcsalad.hu/files/patapodulitu.pdfIn PDF document text
    • http://stsaischoolamritsar.com/slbdavbatala/userfiles/file/68148915286.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/1c94284b5e33d28bffd42442f93ac019/96409367894.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/56001834880.pdfIn PDF document text
    • http://paillasse.hu/userfiles/file/vomikimar.pdfIn PDF document text
    • https://total-sport.pl/img/upload/files/gusasigefadeduj.pdfIn PDF document text
    • https://www.phuketvillarentalandservices.com/ckfinder/userfiles/files/nifiwowosisovak.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/e73b1fd78fbd2186e85e30c8812fd059/fopoxenobojixomof.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA11 11488 bytes
SHA-256: 034757cb2d7746c0b8fc34e305b8a4f5e6ec24047498f16655cc5286a37188e4
font_01_sfnt_off0000f508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF508 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010d1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D1A 18668 bytes
SHA-256: 615273560f54673a0cd5dbe56a3e04921e286aaa9e074a780c7dfce974b6eed8

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