Malicious PDF — malware analysis report

Static analysis result for SHA-256 09de20f845d5a870…

MALICIOUS

PDF

81.0 KB Created: 2021-03-22 09:03:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 839e9e30f45ac696dd3e9378173b8cdc SHA-1: 31e0761441b4e620c4ccf8c3fee64967f152c8d0 SHA-256: 09de20f845d5a870c76b97ceacb08598bccc8ff2676fc4dda88087d6a5e4d8bc
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9990

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://nipisod.ru/123?utm_term=cyberghost+apk+cracked PDF link annotation
    • https://zuseluxutiv.weebly.com/uploads/1/3/4/6/134686448/wisomakukag.pdfIn PDF document text
    • https://kovapuneluwaze.weebly.com/uploads/1/3/2/3/132302913/1be2ec.pdfIn PDF document text
    • https://luwegojozokozop.weebly.com/uploads/1/3/0/9/130969796/90ab3677.pdfIn PDF document text
    • https://lixepugoguzezum.weebly.com/uploads/1/3/4/1/134132265/fuxasaka.pdfIn PDF document text
    • https://cdn.sqhk.co/difixoruze/Fhnh8jj/wuwufexiwikedimenip.pdfIn PDF document text
    • http://8bitbeardsco.com/xijusegufkhgi.pdfIn PDF document text
    • https://cdn.sqhk.co/fosuzonarefi/ijjbjac/59926241083.pdfIn PDF document text
    • https://cdn.sqhk.co/raxoxawupej/dmSHhie/road_trip_activities_for_families.pdfIn PDF document text
    • https://cdn.sqhk.co/tadeketoxab/RVhc5YF/video_downloader_firefox_youtube.pdfIn PDF document text
    • https://kanefudejezem.weebly.com/uploads/1/3/6/0/136056225/3648235.pdfIn PDF document text
    • https://gumewutudeg.weebly.com/uploads/1/3/0/8/130813982/c2f98eb181131e.pdfIn PDF document text
    • https://lotunesu.weebly.com/uploads/1/3/0/9/130969364/303b3bdb1.pdfIn PDF document text
    • http://arendaavto.taxi/devexepamegedivi12kyn.pdfIn PDF document text
    • https://lutatodu.weebly.com/uploads/1/3/4/6/134697406/potifu.pdfIn PDF document text
    • https://cdn.sqhk.co/fowonawex/8MTihib/sonny_with_a_chance_chad_and_sonny_kiss.pdfIn PDF document text
    • https://rujupiben.weebly.com/uploads/1/3/4/8/134852491/sifadonel_mesimirizegojod_rasarafitesewe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6cda4dd4-8aac-43e7-8003-7c0eea9f7907.filesusr.com/ugd/34e26e_3ab68258e6344ff78fe4386e17c1e39b.pdf?index=trueIn PDF document text
    • http://zovewopot.epizy.com/vert_shock_maintenance_program.pdfIn PDF document text
    • http://zajunevoza.epizy.com/no_excuses_brian_tracy_free.pdfIn PDF document text
    • https://c5e26362-acc3-4c40-9db4-ce0cbd355080.filesusr.com/ugd/681527_0fb0fba6193e4e7cb8a3c83a6e4725af.pdf?index=trueIn PDF document text
    • http://pamapubosozule.epizy.com/aankhen_2002_movie_480p.pdfIn PDF document text
    • https://a24bc4ef-4ee2-4fae-af0c-c9fea810b245.filesusr.com/ugd/67d96c_15266e8e98624dfea42bebbd0a3a5974.pdf?index=trueIn PDF document text
    • http://rilulavonepuv.epizy.com/self_evaluation_answers_for_work.pdfIn PDF document text
    • http://latilofu.rf.gd/94808286349.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f42d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF42D 5516 bytes
SHA-256: 4acce77ce09dbf9e16c1eee57c5cde89ae0355c5afe5227472ca8fd9ffa41341
font_01_sfnt_off000106e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E0 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off00010f6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F6E 11188 bytes
SHA-256: c3842c360d05851dbcf441781819e27e45043ad82619653b514fc18c7457ad3c