Malicious PDF — malware analysis report

Static analysis result for SHA-256 baccd1e2b4a186ef…

MALICIOUS

PDF

77.9 KB Created: 2021-06-03 05:26:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 81aeef274f89884f888b67d12f65f0ce SHA-1: 5e8c1e65069e12537d88f7304041a33d6885c2e9 SHA-256: baccd1e2b4a186ef6fd8f1803124f210a8127234ed15ba6d3fe86cba0c6ce5b1
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL pointing to a domain flagged for phishing and link farming. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for distributing further malware or conducting phishing. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect the user to malicious content.

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://fokemale.ru/123?utm_term=abvp+full+form+in+malayalam PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4475847/normal_606565b1ef10a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481828/normal_605a7660b9baf.pdfIn PDF document text
    • https://sutowuvo.weebly.com/uploads/1/3/4/6/134685384/967542d90.pdfIn PDF document text
    • https://nabapobu.weebly.com/uploads/1/3/7/5/137501246/5037096.pdfIn PDF document text
    • https://vimugowome.weebly.com/uploads/1/3/4/3/134323071/5543274.pdfIn PDF document text
    • https://sefujokugitexas.weebly.com/uploads/1/3/1/4/131408298/koruporo_tatoxuwodepex_kuluzimopajofu.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4424696/normal_60b24bd5325b5.pdfIn PDF document text
    • https://nizomepovunamox.weebly.com/uploads/1/3/4/3/134305669/gumevupitogitoz.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/5f5a9193-46f9-43af-b21d-944ee3612c51/the_secret_life_of_pets_2_chloe_trailer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/300058af-8357-4050-b467-23887b75e30a/45854962653.pdfIn PDF document text
    • http://nebapelamive.pbworks.com/f/fezuvisirisoxuku.pdfIn PDF document text
    • http://najapenoz.pbworks.com/w/file/fetch/144540885/give_5_examples_of_adjectival_phrase.pdfIn PDF document text
    • http://zezimin.pbworks.com/w/file/fetch/144422472/can_you_give_someone_a_3_day_eviction_notice.pdfIn PDF document text
    • http://xojifot.pbworks.com/f/86301481327.pdfIn PDF document text
    • http://zizovitunex.pbworks.com/w/file/fetch/144483609/61231796087.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e888fdb3-007a-435b-aa77-0160f2c5d174/41868644887.pdfIn PDF document text
    • http://vazesuna.pbworks.com/f/thermal_delight_in_architecture_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8da34222-7e88-4ade-8133-b27ee939a2dd/is_cat_in_the_hat_poetry.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34f4d0c2-f4bb-45e8-ba46-6978c058f6f5/default_installer_code_for_dsc_neo.pdfIn PDF document text
    • http://vazesuna.pbworks.com/w/file/fetch/144518463/gitibagovotagowil.pdfIn PDF document text
    • http://joxakuruvi.pbworks.com/w/file/fetch/144500925/abcd_2019_full_movie_download_in_hindi_filmyzilla.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_off0000eb36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB36 5160 bytes
SHA-256: 3f8357653fee342bf6add12a06ea43a164928065d894fa3abecc002c967f1798
font_01_sfnt_off0000fcb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB3 1936 bytes
SHA-256: 73983ccd477f0e4c07634362c0f9f13a23cea415a26bff37f7f125d59a681190
font_02_sfnt_off000105f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F6 10592 bytes
SHA-256: cdd1cda4a52c6635900306699483417e44e5f85588d9ca5e32e37e1daaa65805

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