Malicious PDF — malware analysis report

Static analysis result for SHA-256 df782879215ee93e…

MALICIOUS

PDF

76.0 KB Created: 2021-03-06 10:52:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: a4fb1f8a251889cc5e0fd0ebe6c55ad2 SHA-1: c9dbaae110d24327837704094fbe40337777b113 SHA-256: df782879215ee93e34c30f726678d102d4c0953a77d148ed1c9d163db615d997
126 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains a large number of embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing attempt. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external URIs suggest it is designed to redirect users to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://golowaki.ru/wix?keyword=stages+of+clay+quiz PDF link annotation
    • https://juxusuvib.weebly.com/uploads/1/3/0/7/130739690/3487696.pdfIn PDF document text
    • https://dafelubuvotaxid.weebly.com/uploads/1/3/4/7/134753950/2e0af429ee8c.pdfIn PDF document text
    • https://welavomuwaj.weebly.com/uploads/1/3/4/6/134633166/zijubowipajiwefopawi.pdfIn PDF document text
    • http://tasiperop.medianewsonline.com/how_to_reset_xr2_remote.pdfIn PDF document text
    • http://rurokewe.iblogger.org/las_vegas_weather_10-_day_report.pdfIn PDF document text
    • http://balonedud.iblogger.org/15515229386.pdfIn PDF document text
    • https://widosogepe.weebly.com/uploads/1/3/3/9/133986955/2372776.pdfIn PDF document text
    • http://najetaxu.mygamesonline.org/22530498234.pdfIn PDF document text
    • https://mizugoveram.weebly.com/uploads/1/3/3/9/133986338/xudugekavebaro.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1aa11392-c208-4359-9bae-00df642702a7/fluke_77_ii_parts.pdfIn PDF document text
    • http://vodividubo.rf.gd/95513021393.pdfIn PDF document text
    • http://todonoto.epizy.com/kinifewevomijetoxop.pdfIn PDF document text
    • http://dobejul.epizy.com/the_thirsty_crow_poem_in_english.pdfIn PDF document text
    • http://zurekenalemone.rf.gd/colossus_of_rhodes_information.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97f07b17-9967-4bef-9d92-00d640e1cf32/what_happens_at_the_end_of_the_sense_of_an_ending.pdfIn PDF document text
    • http://wolidile.rf.gd/14276548890.pdfIn PDF document text
    • http://lararuzimefusi.rf.gd/higher_lower_game_all_answers.pdfIn PDF document text
    • http://kotidaw.epizy.com/89437937328.pdfIn PDF document text
    • http://tugoxejemikoze.epizy.com/star_trek_discovery_season_2_episode_8_wiki.pdfIn PDF document text
    • http://jejemizon.rf.gd/dazokowotoniriso.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_off0000ef5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5E 5332 bytes
SHA-256: 909c39c66ba3bfd13d1cc6c78c8b5cfb60b9fe71d387950f0b98c522aca25749
font_01_sfnt_off000101ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101AB 9808 bytes
SHA-256: 2e36b5a4eed2efd430815beb72234817c6a1415fe84ac634d023a8f0e7c6079e

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