Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3d9cbfa931651e1…

MALICIOUS

PDF

80.3 KB Created: 2021-03-20 11:28:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0d41782d166929f9efe7c0ff2b5d8019 SHA-1: 31f70567fc1dcc489081f7366fdce93a7f99539f SHA-256: b3d9cbfa931651e1c8fd3d866a8b0db62361f1d5aa7aad1ea4f2d99e0d911730
126 Risk Score

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/wix?keyword=swords+and+sandals+crusader+survival+hacked PDF link annotation
    • http://kovuzaxaf.medianewsonline.com/wimabuzepavetoleworu.pdfIn PDF document text
    • https://cdn.sqhk.co/tapuvimixaxo/jhd6ZpF/11773644673.pdfIn PDF document text
    • https://bidiruvinevuf.weebly.com/uploads/1/3/1/3/131379477/bibogosutafamu_vegidux.pdfIn PDF document text
    • http://tulomodev.getenjoyment.net/mijigojoratexarexorik.pdfIn PDF document text
    • https://cdn.sqhk.co/lekusovu/iieHicd/dr_lynn_kong_ventura.pdfIn PDF document text
    • http://nokojatagi.mywebcommunity.org/how_to_remove_clutch_on_homelite_chainsaw.pdfIn PDF document text
    • http://nosilekexiwot.mywebcommunity.org/chicco_keyfit_car_seat_installation.pdfIn PDF document text
    • https://cdn.sqhk.co/boguzivipel/mie01gi/tomesekirixi.pdfIn PDF document text
    • http://wolovagonu.iblogger.org/all_of_me_piano_sheet_music_jazz.pdfIn PDF document text
    • https://cdn.sqhk.co/vumuwuxa/crk4ia4/birthday_cake_decorating_games_free_download.pdfIn PDF document text
    • https://losebevaxefot.weebly.com/uploads/1/3/5/3/135347065/gesat_bivugoze_vopakakowij.pdfIn PDF document text
    • https://wixotofipexux.weebly.com/uploads/1/3/5/4/135400714/59011ea4cf77036.pdfIn PDF document text
    • https://cdn.sqhk.co/torazanopuni/bSPEnha/market_garden_ww2_map.pdfIn PDF document text
    • http://ferategaj.scienceontheweb.net/36533187266.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://tameladizikep.atwebpages.com/apple_quarterly_report.pdfIn PDF document text
    • http://wumurunapaxilar.rf.gd/68170169565.pdfIn PDF document text
    • https://45f61934-b4a1-4335-a9e3-e142d9465b5b.filesusr.com/ugd/0dd040_cefe73876b7047c9a751c05bd1972975.pdf?index=trueIn PDF document text
    • http://pipiwilevo.rf.gd/iready_book_answer_key.pdfIn PDF document text
    • http://bajivuselome.epizy.com/2308526060.pdfIn PDF document text
    • https://1de4b56a-3309-4767-83a2-f1bb1ea7c594.filesusr.com/ugd/a6e5e9_85411a8c6cf044ea862e2d575a61f597.pdf?index=trueIn PDF document text
    • http://bodudubabafixe.rf.gd/1397271521.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_off0000ecc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC7 5148 bytes
SHA-256: 7c010c240e75073463d607c5a84fdddbf6db9795dfa743999dd5b0a733a49977
font_01_sfnt_off0000fe3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3F 11436 bytes
SHA-256: acc00ddd41b6c508939becb26c6e4e71d4b776f10bca8e0bfcbb9493f5273c7d
font_02_sfnt_off00012523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12523 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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