Malicious PDF — malware analysis report

Static analysis result for SHA-256 67ad3f897746022d…

MALICIOUS

PDF

73.9 KB Created: 2021-01-25 14:28:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 307ea0a8a29c409a8ef9f4ac7718d895 SHA-1: cfe0e3fa1a4ba6b677493acc198f24ac6c58050b SHA-256: 67ad3f897746022df63f8edff4c5f1df502e7c91723a4dc87cc8b39b9714399b
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The embedded URL points to a domain associated with malicious activity, likely serving as a lure for the user to download a secondary payload. The document body, though heavily obfuscated, contains text related to 'Bluetooth setup for windows 10', suggesting a social engineering pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://traffking.ru/aws?utm_term=bluetooth+setup+for+windows+10 PDF link annotation
    • https://cdn.sqhk.co/kidirugolo/6a1hfDM/congo_mine_collapse.pdfIn PDF document text
    • https://cdn.sqhk.co/puwupasakej/ggheijc/sms_message_not_delivered_on_mac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372080/normal_60078c7205bee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365563/normal_60020bc803efb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378628/normal_5fd15a9922420.pdfIn PDF document text
    • https://cdn.sqhk.co/xoxifopu/ehMUAVs/dujaronezonivowoxaliw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417313/normal_600d12a214ae2.pdfIn PDF document text
    • https://cdn.sqhk.co/rawewosit/dghifjb/xagevuxusapuxewakuzuj.pdfIn PDF document text
    • https://cdn.sqhk.co/sofaxuleruri/eUgciaQ/52167721550.pdfIn PDF document text
    • https://cdn.sqhk.co/fexejikexew/fjgjrj2/juego_de_extreme_moto_winter.pdfIn PDF document text
    • https://cdn.sqhk.co/doxowite/jaXObig/tedamapinifoxusudutabomik.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvisisitinu/igicNid/turn_off_folder_sync_windows_7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/juvotepivuwevirokaz.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/saferewobikuriganobuk.pdfIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/acrokeratosis_verruciformis_of_hopf_treatment.pdfIn PDF document text
    • https://s3.amazonaws.com/gitipelut/63657056530.pdfIn PDF document text
    • http://fububosuvakosal.epizy.com/2018_hollywood_films.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/kawaxinesesubitefu.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/fraction_word_problems_grade_7_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/62324357224.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/32858066327.pdfIn PDF document text
    • https://s3.amazonaws.com/ribowexulo/gault_millau_wine_guide_france.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_off0000e566.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE566 5256 bytes
SHA-256: c327a07c721b95b5274374a4bd890d5d1a19e602154b53d4fcafcbe64b71a8c1
font_01_sfnt_off0000f75c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF75C 10240 bytes
SHA-256: 03faca8357ae79637d38b91b2f6c515913503aeb13b8b2bf2e84d8179d05ee4c

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