Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad35d7765078b1d2…

MALICIOUS

PDF

69.5 KB Created: 2021-02-23 20:12:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: aacb84712ed4d7d5b4b07e6970072c4e SHA-1: e7da2bd0311bcf54125a05f850c7d4be2de65675 SHA-256: ad35d7765078b1d255ec8f1a66c93ca72c6ba2218ebc0e4dad2b361ab4947392
224 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file contains multiple embedded URLs, with one specifically identified as a malicious redirector. The heuristic 'SE_REMOTE_SUPPORT_LURE' indicates the document's content likely attempts to trick the user into installing or using remote support tools. The presence of numerous disposable domains and link farms further supports a phishing or malware distribution scheme. No scripts were extracted, but the PDF structure and embedded links are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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.
  • 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://yafferge.ru/strik?utm_term=city+mini+gt+accessories+canada In PDF document text
    • http://generalmassage.online/fekujiziposajoteguk7az7.pdfIn PDF document text
    • http://freds.space/lewozemetifowuweparoteeq.pdfIn PDF document text
    • http://mp4.design/great_ice_breaker_questions_for_high_school_students6y47z.pdfIn PDF document text
    • http://logmeinnow.xyz/36393113336rx50c.pdfIn PDF document text
    • http://webpost.pro/how_to_repair_a_cord_rewind_in_a_vacuum_cleaner7o0qg.pdfIn PDF document text
    • http://missunik.space/radar_speed_camera_alert_pro_apk_download9k6b3.pdfIn PDF document text
    • http://giveaway2020.info/zitasuvabonowilyh46f.pdfIn PDF document text
    • http://hargotel.xyz/181198639719jkqj.pdfIn PDF document text
    • http://smotrikino.fun/insensibility_wilfred_owenog9pa.pdfIn PDF document text
    • http://mazanatur.space/a3_1_cm_grid_paper89b26.pdfIn PDF document text
    • http://hh666o.site/integrative_literature_review_definitionspdzd.pdfIn PDF document text
    • http://reduslim-italy.site/waltz_in_a_minor_virtual_piano_sheet4qmmd.pdfIn PDF document text
    • http://goodshopsales.xyz/2010_cpr_guidelines_aha30o8h.pdfIn PDF document text
    • http://useraisins.pro/how_to_use_dash_hard_boiled_egg_cookerpzv74.pdfIn PDF document text
    • http://trudogoliya.online/79062772994cuoer.pdfIn PDF document text
    • http://leoidet.xyz/troy_film_scriptk2s7r.pdfIn PDF document text
    • https://cdn.sqhk.co/sujutowupolu/cRQhfhf/photo_collage_editor_free_download_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d1d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D9 5232 bytes
SHA-256: c86ad4aa5e42c83b304c5fe850343925413f5327be8946e48b7236a328ea32cb
font_01_sfnt_off0000e38e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE38E 11188 bytes
SHA-256: 2503d0e3321ed76e557b803aad6e6df0a3dcdb7f2e483044758e3e9f4ef14f82

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