Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dc1f49bad3f39e3…

MALICIOUS

PDF

91.4 KB Created: 2021-04-04 19:46:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1c02bd3c37233ab7940f7c286c789d0c SHA-1: cbb3f161d2f2bdc0f449cc60761d53cf31b3f3f3 SHA-256: 3dc1f49bad3f39e3b3b5cc88b0ee6d6fef2574add391eb5927021049374354be
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://midufefew.ru/strik?utm_term=how+to+train+for+football+season+work PDF link annotation
    • http://japarof.mywebcommunity.org/2113927184.pdfIn PDF document text
    • https://cdn.sqhk.co/perikowep/3BPjhaQ/bavikipatubexitobuxerez.pdfIn PDF document text
    • http://carishr.com/86655959177nsjl2.pdfIn PDF document text
    • http://acupofjacob.com/chick_fil_a_menu_nutrition_salad_dressingsxv59o.pdfIn PDF document text
    • https://cdn.sqhk.co/lewulula/czPjjjE/zupezelupuxipumujazizudim.pdfIn PDF document text
    • https://cdn.sqhk.co/xovujiroveg/ehfXyib/ruduxogoxo.pdfIn PDF document text
    • https://cdn.sqhk.co/mogowepuw/jgiihcQ/synchrony_car_care_card_benefits.pdfIn PDF document text
    • https://cdn.sqhk.co/figegixo/ajbHSje/45012591724.pdfIn PDF document text
    • http://instahelpforbusiness.com/find_missing_angle_of_triangle_worksheetsiawb.pdfIn PDF document text
    • http://zuvels.xyz/hello_neighbor_act_3_house_imageshnal0.pdfIn PDF document text
    • https://cdn.sqhk.co/sodelaranu/E3jghhG/rolimopumagageb.pdfIn PDF document text
    • http://7gusevshop.space/chemistry_text_book_class_1164dxq.pdfIn PDF document text
    • https://cdn.sqhk.co/muwunupudi/ii4tge3/merge_preview_mac_os_x.pdfIn PDF document text
    • https://cdn.sqhk.co/fimegasaz/2hdjggi/35148198826.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/nujoxasadiboloselog.pdfIn PDF document text
    • http://zaxutakizet.epizy.com/beauty_camera_app_for_jio_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/32101416633.pdfIn PDF document text
    • http://xevijojikutep.onlinewebshop.net/xavaxerivopulegibefafosa.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/what_happens_when_nest_thermostat_loses_power.pdfIn PDF document text
    • http://nogafojomor.onlinewebshop.net/atex_zone_classification.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/business_mathematics_quiz_questions_and_answers.pdfIn PDF document text
    • http://kokivifox.epizy.com/tutodosuxuve.pdfIn PDF document text
    • http://linakagiwabofa.epizy.com/vatefuxo.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/what_is_a_silk_in_british_courts.pdfIn PDF document text
    • http://nufiwimuzobo.onlinewebshop.net/walgreens_automatic_wrist_blood_pressure_monitor_reviews.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000128c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128C7 5020 bytes
SHA-256: e27355e3f3fbd25df7b9e2f57b213969d2d44166d1f043443ba5158fa22cab75
font_01_sfnt_off000139f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139F7 11240 bytes
SHA-256: 64895b78134f35c77162ca70252b5528de40b4d2be504b55c756f58b41228cfa

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