Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdd4544b11fd0417…

MALICIOUS

PDF

71.7 KB Created: 2021-03-16 16:56:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 414713685c13cdc8e5ca9af14e536f91 SHA-1: ede8a06a9c7c93b54138a1ed972bcfebf51d0a1d SHA-256: cdd4544b11fd041772f18a4f1644cfb37c5ab6007cec4430377b8544fb49a3ff
126 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan delivery mechanism. It contains numerous external URIs, with one prominent URL pointing to 'dafemum.ru', suggesting it's designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, appears to be a lure related to search terms, reinforcing the phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://dafemum.ru/123?utm_term=wordbrain+2+literature+level+2+answers
    • https://jiraxoxaxizare.weebly.com/uploads/1/3/4/0/134012395/db61064dd823797.pdf
    • https://letuwolisabir.weebly.com/uploads/1/3/4/6/134602086/4b53c7c0.pdf
    • http://digosige.mywebcommunity.org/important_characteristics_of_report_writing.pdf
    • https://tewukowil.weebly.com/uploads/1/3/2/7/132741555/sekunepogipewipexad.pdf
    • https://fasipibopokele.weebly.com/uploads/1/3/6/0/136096953/favinelowokurumokok.pdf
    • http://zofifajitazi.22web.org/87067904059.pdf
    • http://mivolamuzimapu.22web.org/18059158859.pdf
    • http://zutatowatipo.mywebcommunity.org/syllabic_consonants_in_english.pdf
    • http://tigobari.iblogger.org/vocabulary_workshop_level_b_answer_key_unit_6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zegisaxan.rf.gd/vobazupufusadawazudefunow.pdf
    • https://s3.amazonaws.com/bokexizometun/lusonivozijedevonowiw.pdf
    • http://madepadejatutof.onlinewebshop.net/antas_ng_wika_quiz.pdf
    • http://motemuguk.epizy.com/rapezajogasisibudaki.pdf
    • https://43cb2d18-1589-43a7-b1c5-fe1278e1c76d.filesusr.com/ugd/370b54_26cbf81446574f13a2152f9782f5e3a1.pdf?index=true
    • http://wufagezigedo.onlinewebshop.net/13756115965.pdf
    • https://f4b9ed98-44c1-44e6-9966-d9817cd43de7.filesusr.com/ugd/9ced5d_16e4809faba940f195edc1680b354aa4.pdf?index=true
    • http://teposowadu.rf.gd/divina_comedia_dante_alighieri_libro.pdf
    • https://s3.amazonaws.com/bubeto/purell_instant_hand_sanitizer_sds_sheet.pdf
    • http://fefogisupiruro.rf.gd/how_much_does_nj_transit_cost.pdf
    • http://ligumawi.epizy.com/what_is_a_discount_rate_in_cash_flow.pdf
    • https://s3.amazonaws.com/davawina/esprit_anticonformiste_definition.pdf
    • https://s3.amazonaws.com/niporofez/84711218295.pdf
    • https://s3.amazonaws.com/sazariwapa/ninofafuwogadoxogikinese.pdf
    • https://4192d618-ecd7-4808-8485-efd4d6773ded.filesusr.com/ugd/17a5db_fdbc0827943b4cedb9a0f8f3b8606479.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d97f.bin
3192c4d554a8830cb19be12cfa3e26ed894efab48a310dbad68ed4199bd018a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD97F 5256 bytes
font_01_sfnt_off0000eb83.bin
0d43df5d899822a94e3d8d53d5b785c88d2d156eac629f8395390bf649eb8a90		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB83 10432 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.