Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d47e433406511d6…

MALICIOUS

PDF

74.5 KB Created: 2021-03-09 07:53:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 98f42a8af18b28021252c38379215760 SHA-1: d0878f701916dedb74f3050c4f5d1f22cd56e3d8 SHA-256: 0d47e433406511d669dae1d265722fbcb273f0d4077fc42e2296c3c020e700a1
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, indicative of a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://leonvi.ru/wb?keyword=wordpress%20themes%20free%20blog%20personal PDF link annotation
    • http://feedbacrnz.space/windows_10_activator_kms_freews2jz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450242/normal_60062b2fafe25.pdfIn PDF document text
    • http://nuverlites.online/pokemon_fire_red_walkthrough_download94z5v.pdfIn PDF document text
    • http://radanews.site/beauty_salon_special_services_2016_subtitle_indonesianols6.pdfIn PDF document text
    • http://blue-tick-central.com/heart_and_blood_vessels_worksheetm4j5l.pdfIn PDF document text
    • http://creditscoreusa.info/engineering_drawing_mcq_questions_with_answers08zew.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486367/normal_5ff3a2b00893c.pdfIn PDF document text
    • https://ramasiwo.weebly.com/uploads/1/3/5/3/135390431/tinuburinux-jebokodawepim-fefepav-fijivimi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445550/normal_5ff146d89d187.pdfIn PDF document text
    • http://milanbeach.fun/juwulojop8dv.pdfIn PDF document text
    • https://xixefofitajeres.weebly.com/uploads/1/3/3/9/133999179/6385f9b7253e3d.pdfIn PDF document text
    • http://granitmetrospecstroy.ru/32742061362atlon.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/a3217451-e808-4d05-b62b-95bdd0541e2d/hp_eprint_wireless_printer_setup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1bdd84a-0e42-4d55-849c-a49c82958253/asu_nursing_major_map_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37544a03-4704-4170-af23-6f5c0a22ce34/dubirobelerufojaramox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e4a58a9-698b-40ed-812b-1f49523355f3/bissell_proheat_2x_not_spraying_water_on_floor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab896e40-9a38-4dd8-8c31-6fa4583c9b0a/fenibajitulijax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab8eb187-2b42-4733-9708-5b12227c8bd8/raxupukajomimibazade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/200f07ed-f787-4d03-8d17-21676b3865e8/wajomixelawuletudoxusiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd4482ab-c959-41c3-8368-84616be9b106/how_to_write_poems_easy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3489afcd-a42b-49ab-966e-512a1120ff60/93532831294.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_off0000e629.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE629 5608 bytes
SHA-256: 22ba15ec4a3f1c78c49c4363510def5f385dc954e7b98eaf555db4edcd1f8de3
font_01_sfnt_off0000f918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF918 10444 bytes
SHA-256: d909807e2f78b71710277f7f951c797a09aef9ce4e3765898344bef591328a15