Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0ea97c722cfaf24…

MALICIOUS

PDF

97.0 KB Created: 2021-07-29 16:45:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 282cd71a1bc5b50ec4e5a7eb3e4b28ba SHA-1: a75ca54f7b75de6668aad55addb664fa7f88df87 SHA-256: f0ea97c722cfaf247a010255a7c5a3d51a4b939102af5e9b3b2f30843e53fc64
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised WordPress upload directories, which host other PDF files. This indicates a link farm designed to distribute malicious content, likely for phishing or malware delivery. ClamAV detection and ML classification strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160b9820295ca0---44741056490.pdf In PDF document text
    • https://twr1115.net/files/fckeditor/file/pobetuwazutumowigimava.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/dbf955695c1bcfde432775bf461f453b/63521113235.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a01ec81f328---peforal.pdfIn PDF document text
    • http://ketoanantamhcm.com/uploads/files/66876922542.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/49ab4649b147aacb6213b903ab6bfb11/munerejofemenu.pdfIn PDF document text
    • https://inverpalmas.com/aym_image/files/gudabofopazobawefumureraz.pdfIn PDF document text
    • http://trustarshida.co/cache/fck_files/file/binadifaxo.pdfIn PDF document text
    • https://hitpoint.tw/userfiles/file/tovunimomavifijej.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/ui6v12e5hdokrmhk5rb4jvh4gh/56350691817.pdfIn PDF document text
    • http://wawabed.pl/uploads/userfiles/file/rekisu.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a44fb42ba86---93113276108.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607df07810f0f---59804180364.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/usk9cibap54vvdtpnv209trftc/rasulebusekalifezu.pdfIn PDF document text
    • http://murphysbeads.com/clients/54316/File/56662597768.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/xezenigolawoxotadone.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c6304246dd9---vixosi.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160cf7a97e6ffa---gufivasoxofovisa.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/gcsnmpe5n50g22fkeu1k52ls35/21199277536.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/31b86e85569d071d5c24bad80627bca1/rafugokifevo.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/98946347720.pdfIn PDF document text
    • http://www.evisiontiendaonline.com/ckfinder/userfiles/files/32938970016.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/4eli4pfgs82p04baqia9se4v5k/nabozanagezowe.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079bc5f814ff---85744993027.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+fit+zoggs+ear+plugsPDF link annotation
    • 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_off00011a16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A16 10664 bytes
SHA-256: c4e1464e9b633c6aed759dceaf6c026871bf5a5ba80476f9fd2724617c7edb26
font_01_sfnt_off000132b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132B8 16608 bytes
SHA-256: a262dfb775eac702e1e195d0f2cf46770c46b031dc11281a8dd7405ed4cbfdc2
font_02_sfnt_off00015dec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DEC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1