Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd4b73d7dbc82e64…

MALICIOUS

PDF

78.9 KB Created: 2021-03-25 16:51:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 84f10b9558a99eab73f386c9d8ee1c49 SHA-1: 74f37f59e542ca7ceea253897719dcbb00aab659 SHA-256: dd4b73d7dbc82e645bd9e7f5952e9be2f5f217969fce3f12418c802b0a65d0bb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document presents itself as a camera manual but functions as a link farm, with numerous embedded URLs pointing to external resources. The primary malicious activity appears to be directing users to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xajibur.ru/award?keyword=canon+4000d+manual+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4455681/normal_5fed63faf226a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378161/normal_604a9cf598fa2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392857/normal_6020923dd536e.pdfIn PDF document text
    • http://wamawebikojas.22web.org/patikudusavuka.pdfIn PDF document text
    • http://kataeta.club/gozunekoxivudowotivuvibe2fak.pdfIn PDF document text
    • http://generatorsale.ru/29263244383v426a.pdfIn PDF document text
    • http://toworugesolur.getenjoyment.net/venuzosopunopiruwa.pdfIn PDF document text
    • http://timinome.getenjoyment.net/oglaend_cable_tray_catalogue.pdfIn PDF document text
    • http://intekzafast.online/webiduxuper7377f.pdfIn PDF document text
    • http://seluluxafej.22web.org/86974140435.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427287/normal_601acae17c3e6.pdfIn PDF document text
    • http://vbruti.site/bigodijuruxalemugoteweqhy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414336/normal_602ca7dbaa170.pdfIn PDF document text
    • http://jizerigozigalav.getenjoyment.net/vepenibasufan.pdfIn PDF document text
    • http://bafazoxukiwux.iblogger.org/esercizi_genetica_zanichelli.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/99878738813.pdfIn PDF document text
    • https://a72a44ae-2aae-4d6a-a6c4-235301d0a62e.filesusr.com/ugd/57436b_6c0f764dd0b341d0a81f5236703ec9c3.pdf?index=trueIn PDF document text
    • http://dowuvoduwitovos.atwebpages.com/44324201483.pdfIn PDF document text
    • https://21319658-e817-4d6a-846f-872ccfe0f0c2.filesusr.com/ugd/982af2_336a77c4fd5a4e728ec20ced7c570a03.pdf?index=trueIn PDF document text
    • http://viwuwijagabote.myartsonline.com/30137645562.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/bissell_proheat_plus_deep_cleaner_manual.pdfIn PDF document text
    • http://rijowetunif.rf.gd/actos_comerciales.pdfIn PDF document text
    • https://178c1879-e916-404b-9861-a2431bd0f83a.filesusr.com/ugd/1aace6_ef5e59403c5c4a9dac3bb222751013a5.pdf?index=trueIn PDF document text
    • https://64f1e6a9-4530-4009-9f9b-67b91dd69f79.filesusr.com/ugd/76b6de_6bd5f3e4ac4244c9a3f4e8142012959f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/1033627196.pdfIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/91886849297.pdfIn PDF document text
    • https://b998fa74-583e-446a-a2a7-67f41460fdb2.filesusr.com/ugd/e081f8_e20a5d8a6be24e6db01f5aee9ed3d4d1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bisute/nufazojoxu.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e94e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE94E 5048 bytes
SHA-256: 4c8ea863deebac862ba792a86d4c851a851d1d593ac34049711b66c3e6003f60
font_01_sfnt_off0000fa6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6C 16088 bytes
SHA-256: ac805265ca7e9481e238282c9c739c3548056a47e84b11cf7f4d129b195c9c35