Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb7760adc33add74…

MALICIOUS

PDF

74.7 KB Created: 2021-05-17 06:52:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: c4cf97321e3fc69e2bd91ca828f8bb71 SHA-1: 0978747cb18d4b0ed33973e48cef47103d83bec8 SHA-256: eb7760adc33add743952db268ad52db7d1dddb01910dcdf461c7f9b65b99ee20
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. It contains numerous embedded URLs, with at least one, 'https://baarspo.ru/strik?utm_term=safety+gate+for+top+of+stairs+with+banister', identified as a potential lure. The PDF structure and embedded content suggest it's designed to redirect users to malicious sites, likely as part of a phishing campaign or to download further malware.

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://baarspo.ru/strik?utm_term=safety+gate+for+top+of+stairs+with+banister PDF link annotation
    • http://ideal-it.fun/trending_tech_news_worldwidexduzq.pdfIn PDF document text
    • http://meetsucre.pro/stanley_fatmax_700_charging_cordsm64a.pdfIn PDF document text
    • https://cdn.sqhk.co/wogokodu/uabghrO/mapa_city_sightseeing_berlin_stops.pdfIn PDF document text
    • https://cdn.sqhk.co/riwaxagi/iciehaX/xokodazebuw.pdfIn PDF document text
    • http://bufo.online/pijowuzaxalijijajazamsjjrl.pdfIn PDF document text
    • http://healthyforczechrepublic.site/dijeporavesijafe2u1zj.pdfIn PDF document text
    • https://cdn.sqhk.co/baruduwege/ihhiHhd/27744593783.pdfIn PDF document text
    • http://prechambre.xyz/jejitukiguo3fts.pdfIn PDF document text
    • http://mosomupusafebin.medianewsonline.com/dulatafopufefivosawedunu.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/1e250a85-0cbc-4c12-b1bb-f9dcb5d1bdd7/does_word_have_a_newspaper_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/dibegoruvekewudaminil.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/99889557638.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c4fd419-2b43-40b5-aa8e-ac8fddb64b42/65611824680.pdfIn PDF document text
    • http://watusatuvor.myartsonline.com/risc_v_instruction_set_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94da5253-ec85-4c9e-9b83-50fb58189ac7/which_is_better_electrical_or_chemical_engineering.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd4ca822-9448-43df-8f49-23785a80fd16/lowex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d013b9d5-4de4-4004-a8e4-adb0fe07428b/29295804122.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a1d3857-8cb3-4e69-abf3-e6528b9809b8/how_to_use_regular_bags_in_a_diaper_genie.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/40418800550.pdfIn PDF document text
    • http://pawepeg.atwebpages.com/bojurodefage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e6694f0-3bbe-43c0-8149-1a64451b783d/building_cross_section_drawing.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_off0000e2fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FC 5568 bytes
SHA-256: 11eadb3ee9bd322dace1655a06f9d17dfcfd640e93515839aeb2759c32308851
font_01_sfnt_off0000f601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF601 11052 bytes
SHA-256: d437cf8fe9f33b45f1dda741c0f2f9ab29afd5c1af413b3db1cad6e5bb4a36a9

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