Malicious PDF — malware analysis report

Static analysis result for SHA-256 31b02941a1616b44…

MALICIOUS

PDF

80.6 KB Created: 2021-05-12 09:28:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8b19e0c42033a8c91c418da2516d8aeb SHA-1: 858237341359e376c6b76db06ec98105c48e4748 SHA-256: 31b02941a1616b44abcfb19d53d943c919a91b18b3c363a1138d61905d44bd9c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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=225%252F65r17+winter+tires+walmart+canada PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4461232/normal_5fe4e4bc14282.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365583/normal_6007621b59844.pdfIn PDF document text
    • https://cdn.sqhk.co/zabitokepum/heIhgGJ/cash_for_apps_free_gift_cards_hack.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384642/normal_5fd60f844e15d.pdfIn PDF document text
    • http://winoorama.website/sap_end_user_training_plan_templatextsae.pdfIn PDF document text
    • https://cdn.sqhk.co/wememiguw/KcCDsjg/zigzagoon_evolution_chart_sword_and_shield.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450890/normal_6033d7d838917.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488604/normal_600fae39cc793.pdfIn PDF document text
    • http://copyrightviolationcenters.com/wexifospfuus.pdfIn PDF document text
    • http://khareedforosh.com/mindfulness_coloring_book_for_adultsr9rfi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480755/normal_605f7b32e7a3c.pdfIn PDF document text
    • http://ninotekega.mygamesonline.org/zezekakurewo.pdfIn PDF document text
    • http://umdtheatre.ru/863799359640uduz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471250/normal_5fc878e9d7414.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410448/normal_5fd187c7d45e8.pdfIn PDF document text
    • http://usene.xyz/architecture_design_process_stepsjjqjr.pdfIn PDF document text
    • https://cdn.sqhk.co/wanazofemuvu/pMidE3c/zalumunowominiti.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jazofi/reset_form_on_submit_angular_2.pdfIn PDF document text
    • http://mubodadekutaxim.atwebpages.com/78295193462.pdfIn PDF document text
    • https://s3.amazonaws.com/zatazewoz/rumogunasidodigupame.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/denon_avr_x4000_remote.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 6

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED73 5340 bytes
SHA-256: beb69204245550ab549f6f47569583cba42788efc8436454154d660fcc73b0e4
font_01_sfnt_off0000ff8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8F 11436 bytes
SHA-256: 9577845c5405840784746407c8b0515a73dfeb6429dd6ae004274d4ef2964314
font_02_sfnt_off00012696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12696 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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