Malicious PDF — malware analysis report

Static analysis result for SHA-256 0765f89f47cbe3dd…

MALICIOUS

PDF

83.7 KB Created: 2021-09-07 19:15:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c863a9359c7d3739a4dec0abad86c806 SHA-1: 76e64c2999eb4c9e7d3cee6e05a5a7f1dd8f1f85 SHA-256: 0765f89f47cbe3dd0127e0b42d6342e8c9e15b4f1a33cb82ec33861a9ab9c5ed
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://drafthe.ru/uplcv?utm_term=white+sewing+machine+1409+manual PDF link annotation
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607c06da959bc---fumadodasirutasekewe.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/3n5l378rpka3627ftkfggf9uro/mojabezabutojetopemezizub.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/38b3ecf4b039527aee26db5b32c9df2f/nikatixedofeladoga.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160806e8b3c671---robefuvabeju.pdfIn PDF document text
    • http://epoxidice.ro/mm/file/81470039846.pdfIn PDF document text
    • http://theaterbuehne-schwandorf.de/userfiles/file/53630826509.pdfIn PDF document text
    • http://valeneighbors.com/userimages/lusixamudekidiwazuranobes.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092569cea0f3---bobegogezere.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160942f305b435---sidozepuzuwugiw.pdfIn PDF document text
    • http://jpsacademy.com/slbdavbatala/userfiles/file/xabenufi.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/161051d415273d---sejutirovos.pdfIn PDF document text
    • http://traiteur-ribot.fr/userfiles/file/lobefupizolikoweguj.pdfIn PDF document text
    • https://holycrosshealthcare.com/userfiles/files/92836626051.pdfIn PDF document text
    • http://spamsmsgiare.com/media/ftp/file/serodesudebawo.pdfIn PDF document text
    • http://execdentalclinic.com/uploads/ckfinder/userfiles/files/87265678515.pdfIn PDF document text
    • http://papianiarch.it/userfiles/files/tezonujujobazabubabazodak.pdfIn PDF document text
    • https://graveyards-fuj.ae/userfiles/files/61505820013.pdfIn PDF document text
    • https://hsiaoying.com/userfiles/file/minemubaxuvon.pdfIn PDF document text
    • https://echipamente-scule.ro/userfiles/file/tewuriko.pdfIn PDF document text
    • http://boursemoi.com/userfiles/file/kegiregasovifebemivusa.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d79f65f10ba---digitomurozoj.pdfIn PDF document text
    • http://sitoad.com/bbqjoekey/files/202106161314439544.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_off0000dfb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB4 11056 bytes
SHA-256: 0f3e516a8df5743a151b8872c43d1bc957533df9744df0a95ab7d8e039ac0b4b
font_01_sfnt_off0000f970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF970 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11182 18080 bytes
SHA-256: d2e7bd0286340e0e9a0ac5c9c0423bc63c57f6ee543b92acefa7490a1aedf27b

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