Malicious PDF — malware analysis report

Static analysis result for SHA-256 8997b5f92cd30c7a…

MALICIOUS

PDF

80.8 KB Created: 2021-05-16 14:07:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ff301f8dd4d007eda1d7cd0c249a30e0 SHA-1: 812bd95a6ef6ecc7208b9d3a27f6b36db8ade7ae SHA-256: 8997b5f92cd30c7af51fe16388991dd3596b98883429dc6ba9e0deb6e8960ddb
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 0.9991

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://jottigo.ru/strik?utm_term=cuales+son+los+numeros+que+mas+salen+en+la+loteria+de+la+florida PDF link annotation
    • http://walkover.me/tezifamuv6wuw.pdfIn PDF document text
    • http://kobivoweder.mypressonline.com/jvc_camcorder_cassette.pdfIn PDF document text
    • http://soldonlittleton.com/sepsis_icd_9_to_10_pcs7aam2.pdfIn PDF document text
    • http://kfcrabota.ru/socratic_questioning_methodguyb9.pdfIn PDF document text
    • http://missunik.space/34177810200rn2ek.pdfIn PDF document text
    • http://beststudent.space/6658995199ftrup.pdfIn PDF document text
    • http://suraneb.scienceontheweb.net/lusajibexi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425235/normal_5fd67774b004b.pdfIn PDF document text
    • http://reform-st.ru/5357739574duqjv.pdfIn PDF document text
    • http://podcard2020.site/proselect_thermostat_wiringuclpp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480580/normal_5fe50eb200500.pdfIn PDF document text
    • http://kijofizovurisos.medianewsonline.com/tofagebamekubavuxuput.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415944/normal_6024fd6d26c8d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423700/normal_5fc948b28f2bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462038/normal_60585a18181f8.pdfIn PDF document text
    • http://fitdieta.com/best_vet_tech_schools_near_mens7ix.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/remavuj/does_the_lg_stylo_5_have_5g.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/978438fe-799b-4713-ae56-5a7e0017ec08/modunumiroxuborupakut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72c5b25a-cb0c-4032-b63e-439424b6fba6/babawevugogoto.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/63095060976.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1219121-1355-40af-b81c-06877280eecb/native_american_falcon_symbol.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/the_danger_of_a_single_story_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdd9dce4-672b-4be4-92ed-b939963a3fbf/winchester_model_94_trails_end_takedown_rifle_in_30-30_win.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b219ab2-61b9-4cd0-a126-6cdf65cc15ce/27550948842.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_off0000f9ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AB 5084 bytes
SHA-256: e4b06e8281513c191f7d78874c16368ba5afdb40a40a5c426ee3cecd74f75b53
font_01_sfnt_off00010ad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD6 12196 bytes
SHA-256: 2ead6c56bead68fbee2d3ae67d903c0fb11e370057462badfad3efb7e9748cae

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