Malicious PDF — malware analysis report

Static analysis result for SHA-256 99fca825e9cec87e…

MALICIOUS

PDF

72.7 KB Created: 2021-06-08 23:46:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2d947d0dbd577060f9c36368a026d5a6 SHA-1: ca12cef5b4519edc93802f4cf4ffbfbd846aefa3 SHA-256: 99fca825e9cec87ec29e28763e611984c69c9144975958956a5089aaf7316deb
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 0.9996

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://bologen.ru/123?utm_term=formal+business+letter+writing+pdf PDF link annotation
    • https://zisugopijelides.weebly.com/uploads/1/3/1/4/131438068/fekotixe.pdfIn PDF document text
    • https://karuxuli.weebly.com/uploads/1/3/4/3/134377251/3670101.pdfIn PDF document text
    • https://dimulawi.weebly.com/uploads/1/3/4/3/134380670/34b2c917d998982.pdfIn PDF document text
    • https://kowedanu.weebly.com/uploads/1/3/4/6/134687265/728209.pdfIn PDF document text
    • https://tadesurirow.weebly.com/uploads/1/3/2/7/132711952/desaket.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474191/normal_603126780549f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458144/normal_6006326fef70f.pdfIn PDF document text
    • https://lifoluzasodani.weebly.com/uploads/1/3/1/4/131437418/sesasawilok_zasegasefoj_vemulozowejekav_resabazumoxuron.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426571/normal_602b3cebb04cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390664/normal_606dfb9578b50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392195/normal_600a06bcf3060.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/79fec343-56c4-4aa6-8df0-f1603cf84142/galaxegulixuwis.pdfIn PDF document text
    • http://kibumezi.pbworks.com/w/file/fetch/144439329/wuwafemuxuxataxagakovaxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53adf593-bc69-469e-9914-88348189e30b/79004459411.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa79fd08-0c74-416b-a8b7-a75ed6ef5eec/53830202194.pdfIn PDF document text
    • http://jujirafamena.pbworks.com/f/engineering_materials_properties_and_selection.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3769a821-1846-41cb-a2b6-86abb42cbd3b/database_management_system_course_objectives.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80262438-a5c5-438e-8331-c497ac8563e4/how_to_shade_blood_angels_death_company.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6546213-0be8-40c1-92f3-953fb162a103/27084208677.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87658cc4-5d08-4474-b48d-180cdb543a07/how_to_enable_adobe_flash_player_on_chrome_2020.pdfIn PDF document text
    • http://buvavipoluvu.pbworks.com/f/jedej.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B6 5548 bytes
SHA-256: b11054ed2c4c4426d9d65828fabde076cf8c265332f60dd98f9a7e54dce12450
font_01_sfnt_off0000f386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF386 9872 bytes
SHA-256: 9241e8420d08512902ac3c950a20a5010ff89b1ce983d6387935fe6d86959207

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