Malicious PDF — malware analysis report

Static analysis result for SHA-256 4629028c54f868bf…

MALICIOUS

PDF

72.9 KB Created: 2021-03-11 17:10:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 12fc9054efa92e379dbe47fdc8a7d92b SHA-1: 10e7ff5b354612378f7f402d7c15170bf04575e2 SHA-256: 4629028c54f868bfec83a3c87abffea60091968ae722b9ad3a4c6fea6f4ff377
126 Risk Score

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 0.9998

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://mezovuduw.ru/123?utm_term=calendario+de+vacunas+2019+chile+pdf PDF link annotation
    • https://cdn.sqhk.co/guwezasov/cibHhdG/f1_manager_cheats.pdfIn PDF document text
    • https://cdn.sqhk.co/jeporikate/igH8jjx/working_days_calendar_2019_canada.pdfIn PDF document text
    • https://cdn.sqhk.co/pasepizut/zIhiift/disney_magic_timer_par_oral_b.pdfIn PDF document text
    • https://cdn.sqhk.co/tewokozogop/ihiaYND/puzutometoju.pdfIn PDF document text
    • http://vomimaforotagi.mywebcommunity.org/introduction_to_structural_dynamics_and_aeroelasticity.pdfIn PDF document text
    • https://cdn.sqhk.co/buzunonoj/hhwScMt/bbc_liverpool_transfer_news_today.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ad323f3e-245e-4e3c-8b16-de91fefec063.filesusr.com/ugd/5ea691_2f2d1428a781446da1bc9ee82738c886.pdf?index=trueIn PDF document text
    • http://xemigososefof.atwebpages.com/lefawozevubugu.pdfIn PDF document text
    • https://ad9e3d1f-bb22-46ca-892e-b6aa3325a756.filesusr.com/ugd/837d34_ae2d7ea4cd88435ca3ed0954ed575fc3.pdf?index=trueIn PDF document text
    • https://128fc002-9ed4-4a8f-9a6b-83b43563a9ed.filesusr.com/ugd/6812d7_bc1f4f1878474d1c9c5fc0dd9bd181e3.pdf?index=trueIn PDF document text
    • https://c4cd0dbc-23d7-4f11-b65f-2561cec8abe5.filesusr.com/ugd/516793_c160a3b913ba4d5187a556532bc69271.pdf?index=trueIn PDF document text
    • http://wadatexutogowig.rf.gd/agrochemical_pollution.pdfIn PDF document text
    • http://fukewabukitiv.epizy.com/48527150781.pdfIn PDF document text
    • https://s3.amazonaws.com/wovedukevikov/jadubabo.pdfIn PDF document text
    • https://69df74eb-9f83-488d-97bb-abb55063df61.filesusr.com/ugd/f34323_283161ffbb9144b3b8ab1702acff294a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nowonovege/zinizosanusixoburemotinum.pdfIn PDF document text
    • https://e216d865-ddc7-438b-99b2-64609380b1bb.filesusr.com/ugd/7ae8b3_140dd56b75484dcda5bd7cf12cd81714.pdf?index=trueIn PDF document text
    • https://18e7ef82-5c75-44fe-ae22-4c356c2c9ce0.filesusr.com/ugd/749e61_39b9dce088ed4ff1b68b730d7bc5f351.pdf?index=trueIn 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_off0000dacd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDACD 5688 bytes
SHA-256: f94be8da89a65e5957c05bb3741addb98e329bf8b79b18fce4b2f765dfc32178
font_01_sfnt_off0000ee24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE24 11988 bytes
SHA-256: 9b80df7156a8aa30b7d6ec7ec4173902de86ef7a73318d81023b56d125066b5c

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