Malicious PDF — malware analysis report

Static analysis result for SHA-256 c54288845151ca0d…

MALICIOUS

PDF

125.6 KB Created: 2021-03-25 15:58:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c98197888b287565d99899aad8da0fe7 SHA-1: 930b570449b6d7112a322e1b9860ad1e44249d63 SHA-256: c54288845151ca0db5d1b643fdb5af30a31422b6e2f42af91a583d4c20b5eb06
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 0.9992

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://baarspo.ru/wix?keyword=natasha+shneider+queens+of+the+stone+age PDF link annotation
    • http://laura-egorova.ru/bobazowizapokitopozodi19heg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453326/normal_604e401e4eb30.pdfIn PDF document text
    • http://kadesevi.iblogger.org/81295423123.pdfIn PDF document text
    • http://grenkasalo4.xyz/defending_jacob_season_1_episode_6_recap3qg9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484633/normal_6017c4df59ee6.pdfIn PDF document text
    • http://qwert-ita.fun/soulfa_free_group_voice_chat_rooms5vp2v.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470401/normal_603b6de115d49.pdfIn PDF document text
    • http://itravelgr.com/24785060781f2c3o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374851/normal_602ba39babe50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469119/normal_605c2be7547cf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/97444f07-bdd9-46cc-a998-399de85689e2/nasuwuk.pdfIn PDF document text
    • http://lebemowabekoko.rf.gd/26971996814.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/vendor_registration_form_meaning_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/97863584618.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3950df2-217d-4eeb-ad03-e30be6688484/56761309082.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/kezomedefifererigivora.pdfIn PDF document text
    • https://68e1e3d4-268d-49bc-a8aa-b119cb10fea7.filesusr.com/ugd/3ceeb9_820446c5ad744ed192e91dfa92ff5c4d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b9d3743-b632-415c-828b-3850e940c71d/sabek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bee36e7-39a9-4766-9bd8-7779a71edc44/toro_weed_wacker_starts_then_dies.pdfIn PDF document text
    • http://tinuzutajalik.epizy.com/balkar_sidhu_song_djjohal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bb58a08-f543-4b8e-9b1c-65829fc216f3/lojedamumitoxigojago.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/92469814547.pdfIn PDF document text
    • https://52ed6390-a5c1-4502-9f93-599cf6d98ad1.filesusr.com/ugd/f7fbc8_65b2ce497f334d618742d7c2aed42201.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jawusawar/school_absence_excuse_letter_format.pdfIn PDF document text
    • http://kokibitumoxa.epizy.com/29453769433.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_off0001a9cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A9CF 5232 bytes
SHA-256: 2b0ece63c8f0cec9ba179f2ee14039cc645441a54430df5db6b9e2cea2e96477
font_01_sfnt_off0001bb90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BB90 14564 bytes
SHA-256: 4fbe69ad73d4ce68504ba1b82c029fc9e0fb29b6816837412a8d05f6458a78fd

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