Malicious PDF — malware analysis report

Static analysis result for SHA-256 a413197ddc182ae7…

MALICIOUS

PDF

75.0 KB Created: 2021-03-12 12:14:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 49fa87cf7879c78deae8cc8ee493f56b SHA-1: 951f49484076573a7244a151b487d05e2d43de73 SHA-256: a413197ddc182ae7f0a04640dec1ca8bb6e52c1e3ab79c9f3751f3ae41561ba4
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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
  • 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://soxebez.ru/wix?keyword=voicelive+3+manual+espa%25C3%25B1ol PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4394062/normal_5fe84642175d4.pdfIn PDF document text
    • http://gaberiwilovu.22web.org/guitar_music_theory_for_dummies.pdfIn PDF document text
    • http://weinmvc.net/zodotifufuwolifatajosekesc7xfe.pdfIn PDF document text
    • http://milanbeachs.space/microsoft_publisher_torrent2bg7o.pdfIn PDF document text
    • http://pressit.fun/lilepukigabebavorix3b0u.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470972/normal_5ff02751605bb.pdfIn PDF document text
    • http://apparentlyopt.com/750736714262khln.pdfIn PDF document text
    • http://whitecheat.xyz/snt-_tc-_1a_2011_editionf680w.pdfIn PDF document text
    • http://lighterusb24.site/94917445702svi3a.pdfIn PDF document text
    • http://oneitstore.pro/garmin_vivofit_jr_2_disney_replacement_bandsw1yed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471249/normal_60303d79c34b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469126/normal_6048a46145ea1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481825/normal_6001223fe77c3.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/8409da5c-f35d-4d67-b43c-74b060a59df9/94929140029.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b95ddd9-5c23-4ec4-8b41-3a57bdfa25bc/short_story_free_childrens_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0686d807-4755-4740-858a-2b629e79723f/wojeguliwuwufakodur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d5ffc58-7356-4b7e-a346-02292e069c76/risd_academic_calendar_2018-19.pdfIn PDF document text
    • http://wigelasipop.rf.gd/lorovizanijuvatuve.pdfIn PDF document text
    • http://wegarasuw.epizy.com/47525921429.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb36cfdd-85bc-4dc6-b8bb-9f6571027d3f/how_to_maintain_a_nuclear_power_plant.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb05bba5-215e-4b47-b8ad-6305b7136c93/eating_low_calorie_at_taco_bell.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ad35a9d-3874-4d08-80df-ce76a9b940e6/how_to_write_a_professional_resume_and_cover_letter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5296cb0-dde9-4f63-b2e8-208bb6d2d00c/zebudakosenipiruvudak.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_off0000e758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE758 5384 bytes
SHA-256: 9ec8fed24fb806bc8cc1112222e288e54cb728ed219cae5a912c5f447ba9bc12
font_01_sfnt_off0000f963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF963 10456 bytes
SHA-256: 44573449e111f08e933468c272fc1296d00b3eb4fc5872c1d19f0a6021f4e97f

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