Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6f5327f705b1e7e…

MALICIOUS

PDF

58.1 KB Created: 2021-06-01 09:38:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95dd2528b34b411785a8de447ac289b9 SHA-1: 0445e8701a131425797f0682581fdb7e4c328720 SHA-256: e6f5327f705b1e7e7a1b62d62f69b50c3c4ee7f1aee6d051c51647773fe6fbed
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs pointing to disposable hosting services, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains references to '365 remedios caseros pdf', indicating a lure for users seeking home remedies.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

Heuristics 4

  • 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
  • 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://chcial.ru/pbw?utm_term=365+remedios+caseros+pdf
    • https://sefegoxelogip.weebly.com/uploads/1/3/4/8/134866711/6025501.pdf
    • https://romesezex.weebly.com/uploads/1/3/4/6/134605020/kovuwedetokopul-bamonawadugobu-kotowe.pdf
    • https://wapexuji.weebly.com/uploads/1/3/5/3/135329723/88a7bb2993.pdf
    • https://nibuzexo.weebly.com/uploads/1/3/4/7/134720699/1504248.pdf
    • https://mulokigapasol.weebly.com/uploads/1/3/1/0/131070847/7895888.pdf
    • https://vixewomofuv.weebly.com/uploads/1/3/4/6/134606761/pufipanizujelo.pdf
    • https://zevigetadafuwun.weebly.com/uploads/1/3/0/9/130969942/fomutukilewaral.pdf
    • https://gunobodupisar.weebly.com/uploads/1/3/4/6/134677737/bivanid.pdf
    • https://gexuganogos.weebly.com/uploads/1/3/0/8/130813630/sevelepodo.pdf
    • http://kapetipubi.pbworks.com/w/file/fetch/144426048/youtube_go_app_for_pc_free_download_new_version_windows__mac.pdf
    • https://uploads.strikinglycdn.com/files/aa29ac6f-47da-4bae-a8a8-b47d1f8c8195/adobe_premiere_rush_manual.pdf
    • http://pozapagula.pbworks.com/w/file/fetch/144417504/fuvofugosatovewu.pdf
    • http://mepijewaj.pbworks.com/w/file/fetch/144426642/77595270478.pdf
    • http://mifimoruzuwo.pbworks.com/w/file/fetch/144431553/56852243714.pdf
    • https://uploads.strikinglycdn.com/files/393bb40d-18b0-4b36-81d2-4b56a41412da/97305882344.pdf
    • http://mumubib.pbworks.com/w/file/fetch/144414021/10709649390.pdf

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