Malicious PDF — malware analysis report

Static analysis result for SHA-256 c56201e018bccab7…

MALICIOUS

PDF

78.4 KB Created: 2021-03-18 18:33:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 732dd7d4687dce14f78f0bb539ef1dfe SHA-1: 15b14df0a88e6d041f1fb0f97473021774bc0feb SHA-256: c56201e018bccab705bd2c1c0c7aec02f55ec6bf0685a19455697dabf8140af4
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to PDF files, suggesting a link farm or a distribution mechanism for malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. The embedded URLs are the primary indicators of compromise, directing users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=armorsmith+gw2+guide+1-+500
    • https://xetutimi.weebly.com/uploads/1/3/0/9/130968997/rorodazewowilu.pdf
    • https://cdn.sqhk.co/povewepalu/hh8ihjf/10411035914.pdf
    • https://dipedupaketi.weebly.com/uploads/1/3/4/3/134333799/posulitumovilez.pdf
    • https://cdn.sqhk.co/rewakevutel/c8gjjiE/tomando_definition_in_english.pdf
    • https://cdn.sqhk.co/sisadenev/P5phicB/mini_world_block_art_apk_day.pdf
    • https://cdn.sqhk.co/gelowidabik/icjcrzO/cosmos_pizza_boulder.pdf
    • https://cdn.sqhk.co/lijipatalenu/aNTjirr/sports_scores_widget_iphone.pdf
    • https://cdn.sqhk.co/sadirorig/jfEhbie/38335954585.pdf
    • https://cdn.sqhk.co/tibidimewako/acrhi6X/euro_truck_racer_3d_simulator.pdf
    • https://cdn.sqhk.co/gogoturowib/RIY4fYR/tinopifabenexazekakijatu.pdf
    • https://cdn.sqhk.co/makubeku/gt6iagc/merge_meadow_cute_animal_collector_plates.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cfff6b0e-fc0f-4d9c-a983-c0e60c8b2bfd.filesusr.com/ugd/c637e3_8d47a85d3a9e4a1b90caca353a075957.pdf?index=true
    • https://fe92b815-f0fe-4223-924b-659339f44b90.filesusr.com/ugd/8f64fc_3b2de14c4adc43c381d79c12b39371ac.pdf?index=true
    • https://8a833fea-7c9a-4d2e-a5a7-d3590f42a3e5.filesusr.com/ugd/9aab09_75921e7089764b168496a521a71ac4e4.pdf?index=true
    • https://1e8c0764-4a0f-46ab-84a2-5f63a8a44928.filesusr.com/ugd/6a0acf_70f855bfa1724b2c941ecd1b44f49a5c.pdf?index=true
    • https://0503187d-52cd-4237-9521-a3cb9bf551ae.filesusr.com/ugd/5bb01c_f46e57c1b4a54d21b1c6142820d16368.pdf?index=true
    • https://41c240d9-b4af-4f88-8fa4-2a41cce3a287.filesusr.com/ugd/01bc73_41d3f3ed4b9249cd8f955927d04d77a5.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6b9.bin
f53c7139f98af9c4e06fe49b13e5dec479c6dbd4303dc9960ebff5e6267bec51		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B9 5560 bytes
font_01_sfnt_off000109a2.bin
648ed5348f8390c203e8a2790323e91064bf7ee74796215669cf84147430ee5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109A2 10284 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.