Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e4557440c15d0ff…

MALICIOUS

PDF

87.5 KB Created: 2021-03-18 23:53:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9b40127729ff193e4743fb3b000adcad SHA-1: 136bfa28e5358cff13bac0f0548b0dcc08cc9da3 SHA-256: 1e4557440c15d0ff0b7cc7f964011b2a09426fe70f008f1a35950c127c1958b4
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://jumiwimov.ru/wix?keyword=dnevnikivampira+7+sezon PDF link annotation
    • http://idealicacolumbia.site/final_fantasy_7_original_review_ign0c70y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477401/normal_602cb1b2ba809.pdfIn PDF document text
    • http://graatorama.fun/fowariwelugfehy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476274/normal_603caa70cb422.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381964/normal_5fdafe971b73f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369793/normal_600b52c57ab39.pdfIn PDF document text
    • https://cdn.sqhk.co/pilozarager/ijcPcNT/the_hitman_s_bodyguard_trailer_song.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478133/normal_5ff7abb750104.pdfIn PDF document text
    • http://vannabanyavsedela.xyz/vejowalezarosinekuzisenofhpjc.pdfIn PDF document text
    • https://cdn.sqhk.co/wazikunal/Sghjj3G/az_screen_recorder_no_root_download.pdfIn PDF document text
    • https://cdn.sqhk.co/vedimurami/2gftn2x/girls_fashion_design.pdfIn PDF document text
    • https://cdn.sqhk.co/sesexibanobu/d9MHb8O/51752691286.pdfIn PDF document text
    • https://cdn.sqhk.co/lojeliju/9giu7hg/2208274187.pdfIn PDF document text
    • http://ulekschool.online/titabakurijaxsfo9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387698/normal_6012f4fd4350c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475739/normal_5fddae0a7bdf5.pdfIn PDF document text
    • http://fitnesspack.net/2014_jeep_grand_cherokee_service_manual44nmv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sebokegekesuded.atwebpages.com/124946261.pdfIn PDF document text
    • http://kuxoxokazutuv.myartsonline.com/quran_in_english_with_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/640e0f7c-d240-4ba9-bf6b-4ef0eedece0f/zexavazigiwagefo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35dd291d-785d-4f71-b925-77548e557535/81378202882.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_off00010c03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C03 5184 bytes
SHA-256: f0b0ffd0a60587bba9ec1e962d50edc9344fa6b33b510a9373cc6d170a69d447
font_01_sfnt_off00011db2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DB2 15744 bytes
SHA-256: c99f236b00e39958541d092f2b6e1cbe5c64d644ac84aef3676b5082b6d5435e

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