Malicious PDF — malware analysis report

Static analysis result for SHA-256 3086ab0a5740e6ab…

MALICIOUS

PDF

74.4 KB Created: 2021-02-20 23:09:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 783aff5f23d628e800acb026d103581a SHA-1: 474b0286e852985d9b28b807d7ddbc1b78895352 SHA-256: 3086ab0a5740e6ab7760a87b0fbdb125cfdb07ac5b267780e1bf3abdeabf3473
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains or link farms, indicating a phishing or malware distribution attempt. ClamAV and ML classifiers strongly indicate maliciousness. The embedded links are likely used to redirect users to malicious sites or download further payloads.

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://jacksth.ru/strik?utm_term=vizio+sound+bar+wireless+subwoofer+how+to+connect PDF link annotation
    • https://cdn.sqhk.co/wenudiwome/ehfgeij/zombie_prom_party_ideas.pdfIn PDF document text
    • http://mesretly.xyz/farberware_6-quart_digital_xl_air_fryer_oven_user_manualws51n.pdfIn PDF document text
    • http://balifruit.com/mipemuxumetanuxe5aif6.pdfIn PDF document text
    • https://vopilejuwe.weebly.com/uploads/1/3/1/4/131407469/xelotebimubutol.pdfIn PDF document text
    • https://gazesomudari.weebly.com/uploads/1/3/1/0/131070071/da72f50391.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370561/normal_602f482af13d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387061/normal_6015e50594637.pdfIn PDF document text
    • https://cdn.sqhk.co/xutujipux/Kheiav5/troll_level_ideas_mario_maker_2.pdfIn PDF document text
    • https://cdn.sqhk.co/dodiniwotud/Hziejjb/best_free_movies_on_amazon_prime_imdb.pdfIn PDF document text
    • https://cdn.sqhk.co/wunasesev/Ogg1jid/gps_maps_voice_navigation_directions.pdfIn PDF document text
    • http://clyb-wylcan3.space/autocad_2016_installerypbgx.pdfIn PDF document text
    • https://cdn.sqhk.co/xorazasuno/hwfhdjg/19607617727.pdfIn PDF document text
    • http://becloud.website/apresentao_de_empresa_de_engenhariax7eys.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459917/normal_5ffb267174d1d.pdfIn PDF document text
    • https://cdn.sqhk.co/dosazuleg/gPMEDre/47441389360.pdfIn PDF document text
    • https://cdn.sqhk.co/bugininaxi/rXrZHja/nora_fatehi_saki_saki_video_song_download.pdfIn PDF document text
    • http://form-lnstagramcopyrightservice.com/nb_9000_elliptical_trainer_manualpok05.pdfIn PDF document text
    • http://trickyturkey.com/security_monitoring_in_cloud_computingwsk5l.pdfIn PDF document text
    • https://cdn.sqhk.co/xakelafu/0KrS8hZ/venegupimip.pdfIn PDF document text
    • http://lidlid.xyz/motorola_xpr_7550_factory_resets8ukp.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_off0000e68d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE68D 5356 bytes
SHA-256: 5457b9d08fc9e356831b8be31ec7d20da5e4fe218a7cd485c2eca25d133275c2
font_01_sfnt_off0000f8db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8DB 10576 bytes
SHA-256: 57894915b042fe5efc65c55ead5323105b19b0a4ddf2089e5883c2619ee9c849

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