Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cea77321d204b44…

MALICIOUS

PDF

71.9 KB Created: 2021-06-02 22:51:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: fc5358ef9f3a6630cf95e7a8b321dba1 SHA-1: 8e2c5690a92729f41832385731dd69ef35a6ddb2 SHA-256: 8cea77321d204b4472445a5e4602e88195727a775dd6fe695f4e67a459ec6c52
124 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains multiple embedded URLs, with one pointing to a suspicious domain ('huntic.ru') that is likely used for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to a book summary, which is a common tactic for social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8129

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://huntic.ru/pbw?utm_term=por+que+fracasan+los+paises+resumen+capitulo+14 PDF link annotation
    • https://kinamolifurepe.weebly.com/uploads/1/3/2/7/132710726/5dc3ab7a6.pdfIn PDF document text
    • https://bojebunu.weebly.com/uploads/1/3/0/7/130775379/xodan.pdfIn PDF document text
    • https://nekizazewovira.weebly.com/uploads/1/3/4/6/134627499/fakobuzuwar-malufixawogej-mefefuguzalow.pdfIn PDF document text
    • https://binenivav.weebly.com/uploads/1/3/4/5/134516867/misotoxesibokikeduz.pdfIn PDF document text
    • https://raxeruzuk.weebly.com/uploads/1/3/4/7/134743740/tejelajenasatu-lifidone.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/7fd3260f-60cc-40b2-8b95-4181110a3091/how_to_invest_in_money_market_fund_in_kenya.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6070589f-823f-4dab-8f55-0df8ad0e7c73/atlas_copco_compressors_llc_charlotte_nc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be1db797-aa92-439d-b767-f678f582510a/kepirusoguliketumujur.pdfIn PDF document text
    • http://veweran.pbworks.com/f/download_antivirus_smadav_2019_full_crack.pdfIn PDF document text
    • http://juvupumanut.pbworks.com/f/samsung_smart_hub_tv_remote_control_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a8a3b41-6ec9-487f-b730-fdf90e4bac78/84837362127.pdfIn PDF document text
    • http://lekipirunezi.pbworks.com/f/convertir_coordenadas_geograficas_utm_a_grados_minutos_y_segundos.pdfIn PDF document text
    • http://lakebimutep.pbworks.com/w/file/fetch/144417756/how_to_know_what_size_your_gucci_belt_is.pdfIn PDF document text
    • http://bovojigu.pbworks.com/f/ratio_of_perimeter_and_area_of_similar_figures_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35565e4c-d004-4981-b68b-67e094bbe4c0/kenmore_microwave_oven_light_bulb_replacement.pdfIn PDF document text
    • http://mefijunov.pbworks.com/f/38299280003.pdfIn PDF document text
    • http://sekodegaxex.pbworks.com/f/gexinilukani.pdfIn PDF document text
    • http://visetululiv.pbworks.com/f/operations_management_sustainability_and_supply_chain_management.pdfIn PDF document text
    • http://junerew.pbworks.com/w/file/fetch/144500481/42142116072.pdfIn PDF document text
    • http://lugozamuxika.pbworks.com/w/file/fetch/144422961/how_to_install_android_os_on_blackberry_passport.pdfIn PDF document text
    • http://kefimazusob.pbworks.com/w/file/fetch/144424770/tisilebukinovizukizun.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_off00010105.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10105 5428 bytes
SHA-256: 039316a902b72b49836f50e57ec2c0b76f6cb4b85d062eccb832d4b586552f4a

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