Malicious PDF — malware analysis report

Static analysis result for SHA-256 f027611f202b61ad…

MALICIOUS

PDF

74.5 KB Created: 2021-03-03 21:08:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 87b15478e19d56bb082d0e43f7356736 SHA-1: 5e58c8b390a3bd190102c739784694bae9216621 SHA-256: f027611f202b61ad03ae1be955b4e41bb8f26db1abf5ff57abee2ea5fa7c4469
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by 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 0.9999

Heuristics 4

  • 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://kuzutuzo.ru/123?utm_term=jacuzzi+laser+sand+filter+model+160l+manual PDF link annotation
    • https://fofumizuzel.weebly.com/uploads/1/3/2/7/132740209/5795679.pdfIn PDF document text
    • http://xiwefugu.iblogger.org/contax_t2_battery_cap.pdfIn PDF document text
    • https://cdn.sqhk.co/xumelesep/giharJj/pop_rock_music_artists.pdfIn PDF document text
    • http://adanakebap.org/vivuli63led.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370054/normal_60210590ec17d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405193/normal_5fd678d762b2b.pdfIn PDF document text
    • https://wuriwodek.weebly.com/uploads/1/3/4/6/134688082/mumuzalekoke-kufivov.pdfIn PDF document text
    • https://nunugaborunis.weebly.com/uploads/1/3/1/4/131437119/tepoxixuxapux-kojeninizonifo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455876/normal_5fc7a4a46a2f0.pdfIn PDF document text
    • http://itslm.fun/zotivibajemn70kd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474992/normal_5fda3b0ca421a.pdfIn PDF document text
    • http://zarabatyivat.ru/46860111078xf20p.pdfIn PDF document text
    • https://rifivubego.weebly.com/uploads/1/3/1/4/131407021/fekawaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370074/normal_602a1fa981bc0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zapudeni.epizy.com/dd_adventurers_league_character_sheet_spells.pdfIn PDF document text
    • http://zaxukesaludu.epizy.com/ipad_mini_5_size_dimensions.pdfIn PDF document text
    • http://pakebixulo.epizy.com/kinixitakonalesexuragi.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_off0000e1af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1AF 5556 bytes
SHA-256: c024ac5c9739ef458ed2fe422ae86c0c1260f060ca92644d953db44373f759b0
font_01_sfnt_off0000f486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF486 11580 bytes
SHA-256: 3e4d04def90b61dd04b61461f9e2d9c2b323fa7fad114a79261e1152f0d4923a

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