Malicious PDF — malware analysis report

Static analysis result for SHA-256 f436fb89298ad421…

MALICIOUS

PDF

75.9 KB Created: 2021-03-19 10:40:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9e271dd52f6b934339dabf694af11efd SHA-1: bd8ffcb6c9a0f0fbe67be67d382e4b9409570665 SHA-256: f436fb89298ad421198ea7ad0af80351a6e0570c4633c0e6242248e60ff991e9
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 0.9991

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://jacksth.ru/wix?keyword=races+of+eberron+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4460690/normal_603e7ca2d59d7.pdfIn PDF document text
    • https://cdn.sqhk.co/tadawatimi/ejge3gf/logo_nasa_natural_nusantara_png.pdfIn PDF document text
    • http://reduslimitalia-oficial.site/the_annales_school_an_intellectual_historytse92.pdfIn PDF document text
    • https://pijaxulejogelub.weebly.com/uploads/1/3/0/8/130874219/dimodoluxotutod_finekurusevudu.pdfIn PDF document text
    • https://bokoxopeke.weebly.com/uploads/1/3/4/2/134266118/lovexegure.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420775/normal_5ffb74e689cc6.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/WgjFsid/mifejoxozigupebexe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451039/normal_60208f24cac18.pdfIn PDF document text
    • http://mebets.xyz/783261547503lpp.pdfIn PDF document text
    • http://stopnutristrike.ru/que_es_la_comunion_espiritual_oracion66cyc.pdfIn PDF document text
    • http://mawobireti.iblogger.org/45373122765.pdfIn PDF document text
    • https://lemefiware.weebly.com/uploads/1/3/4/0/134017231/5134d05d719.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421042/normal_604a75773367d.pdfIn PDF document text
    • http://hdvideo.design/junoxitnafal.pdfIn PDF document text
    • http://daimontimur.org/tapumigupakizukeq6lgy.pdfIn PDF document text
    • https://resodarapasak.weebly.com/uploads/1/3/4/6/134659305/535145.pdfIn PDF document text
    • https://cdn.sqhk.co/nikamegamu/ggzjcjf/50515204647.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gafazexetoraxik.epizy.com/36675491365.pdfIn PDF document text
    • http://saripugoxek.rf.gd/maximum_flight_duty_time_easa.pdfIn PDF document text
    • http://jopokodex.rf.gd/tipukanegosaz.pdfIn PDF document text
    • http://luwemazezabubat.rf.gd/flannel_sheets_on_sale_near_me.pdfIn PDF document text
    • http://danofawo.rf.gd/samsung_galaxy_s4_manual_download.pdfIn PDF document text
    • http://disidigepaxu.rf.gd/tamadowipusevuxumololagu.pdfIn PDF document text
    • http://jabelakejirer.epizy.com/ponodonefutakoxo.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_off0000ec30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC30 5264 bytes
SHA-256: bde2f7653bfb387f1517e006a59f8df502cf15cc990788d99e6a3727b8b85f19
font_01_sfnt_off0000fe25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE25 10632 bytes
SHA-256: fc75a758837761ab1fb3c9c1d3eca033d5b9c3ec7fc55cd2b22f3c699c6600a2

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