Malicious PDF — malware analysis report

Static analysis result for SHA-256 87ee17ac8d9c1ee4…

MALICIOUS

PDF

79.3 KB Created: 2021-03-20 21:53:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 616380f6ed771130db0b71df77cc6bdf SHA-1: 9964c1cc4cd184c6a03b8b349f4f2c47f7dc8c09 SHA-256: 87ee17ac8d9c1ee4c40387659c984c327ed4e8fd1cdc8bed4bc45b9496454d6c
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable or suspicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document, likely a spearphishing attachment designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gimoguvi.ru/wix?keyword=ensouled+heads+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4475847/normal_5fd6d2b576517.pdfIn PDF document text
    • https://xevosafodom.weebly.com/uploads/1/3/4/7/134739965/44b32f5c9f.pdfIn PDF document text
    • http://subbellassecret.com/49641793689t9zb0.pdfIn PDF document text
    • http://defokozixeral.sportsontheweb.net/23974026315.pdfIn PDF document text
    • http://vk-settings-change.online/dukaviwodafegomiluma7ylr3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413462/normal_5ff272b77cdd0.pdfIn PDF document text
    • https://gamevuwi.weebly.com/uploads/1/3/4/5/134525912/mitejo-dugitafagux-zegosigifuxos.pdfIn PDF document text
    • http://lisolu.org/what_is_the_value_of_a_2006_gmc_envoylfzdp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491926/normal_605449a2a10c3.pdfIn PDF document text
    • http://giwapozolaleg.mypressonline.com/traducir_textos_del_espaol_al_ingles_gratis.pdfIn PDF document text
    • https://subolamamojoga.weebly.com/uploads/1/3/4/7/134719430/c5e47ff.pdfIn PDF document text
    • https://limofagis.weebly.com/uploads/1/3/4/6/134640762/2a0a2fcb013c12f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460045/normal_5fdc8b719d846.pdfIn PDF document text
    • http://cafe-cok.ru/909426041329qfm9.pdfIn PDF document text
    • https://vakupakofusiwu.weebly.com/uploads/1/3/5/3/135399484/zutojuwubavop.pdfIn PDF document text
    • http://nitapida.mywebcommunity.org/26420802147.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489407/normal_6048f68fcd845.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c3438639-6a75-4920-aa4f-d1e0b619354f.filesusr.com/ugd/3be3a7_c60851293809493289c7738e727b6445.pdf?index=trueIn PDF document text
    • https://fea67d75-dd3b-4bdd-af05-748e92ec8a52.filesusr.com/ugd/05900a_29383235790845c0bd49750faf6ad9a8.pdf?index=trueIn PDF document text
    • http://filosoko.onlinewebshop.net/jeppesen_instrument_commercial_manual_free_download.pdfIn PDF document text
    • https://09235f31-469a-4613-94fc-36d04c1f642a.filesusr.com/ugd/8b6407_f8767c8b4798401097aa801033ff41e0.pdf?index=trueIn PDF document text
    • https://be1d055c-b83b-422e-9e68-1bf13cef350c.filesusr.com/ugd/5b1e3c_447386cc7b094d7088de9da37a961379.pdf?index=trueIn PDF document text
    • https://297de083-771a-4730-a3b8-a2afe8c7d209.filesusr.com/ugd/47424f_4c08301960f048c3869e96277eb39cc4.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF861 4948 bytes
SHA-256: 5cd8de3f54d10ba11197485f9b6a19600f27473c35b1047a505cdde03717c6d8
font_01_sfnt_off00010935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10935 11380 bytes
SHA-256: e1fefb82adfbd4baac978f7775ac318a9eb0c6e19a414733f3158746b406718e