Malicious PDF — malware analysis report

Static analysis result for SHA-256 70b4a2d26987ee80…

MALICIOUS

PDF

149.7 KB Created: 2021-03-31 22:40:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 2a216113c44815aa67b024e29e63ea55 SHA-1: a9bbe7b427b0df483441119adeb9894e0dedae52 SHA-256: 70b4a2d26987ee80e1f87618bef55a968bc9acb3ce2d58a628c85df654fb7722
124 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are flagged as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to a search query, directing users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9258

Heuristics 4

  • 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
  • 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/award?keyword=15.+3+applications+of+genetic+engineering+answers+pdf PDF link annotation
    • http://ujjjrrrrr.space/passive_voice_complex_sentences_exercises3gkeq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478438/normal_602ae4f48f917.pdfIn PDF document text
    • https://mifesala.weebly.com/uploads/1/3/2/6/132683173/155b90fb.pdfIn PDF document text
    • https://zefinefan.weebly.com/uploads/1/3/2/8/132816158/8455350.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417643/normal_5feb24cd79f9b.pdfIn PDF document text
    • http://gufutaca1.xyz/fefozotokubk6fuj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365656/normal_6001fd94314f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476140/normal_601d8c75274db.pdfIn PDF document text
    • https://pinowutofabu.weebly.com/uploads/1/3/4/7/134763632/wesafasovizibi_zigalisuma_lupanoxe_kokisuk.pdfIn PDF document text
    • http://olx-delivery.cc/sefokupad4i8t.pdfIn PDF document text
    • https://vavirewafikeja.weebly.com/uploads/1/3/4/4/134402836/74e5c45065cbdf.pdfIn PDF document text
    • http://in-step.shop/diaper_genie_refill_hack6ytsx.pdfIn PDF document text
    • https://doruxajowivabog.weebly.com/uploads/1/3/4/8/134870444/730e6e2ece0a.pdfIn PDF document text
    • http://bibeponuvizozu.iblogger.org/animal_crossing_3ds_pc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vetuvawefaxuta.rf.gd/37125977905.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80ef7a21-8ba0-427c-8022-f211a2a327f1/wisekovamazuvibuwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/193d8971-5c95-49b1-b62b-20cff12f1461/operating_system_for_samsung_chromebook.pdfIn PDF document text
    • http://baparuzijakajak.rf.gd/tipupuletetorufilofage.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/zusajubemabaf.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/naughty_dare_questions_and_answers.pdfIn PDF document text
    • http://daxevetefixidaj.epizy.com/benim_hocam_tyt_trke_soru_bankas.pdfIn PDF document text
    • http://degejukifukux.epizy.com/69601729773.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/free_powerpoint_templates_microsoft_office.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/fazibenede.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/brutal_age_mod_apk_new_version.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002339d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2339D 5480 bytes
SHA-256: 21cfce58901e062d75fb370011aba23ea378f8f1b6773db81a4c3b24bdd0507e

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