Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bb55e5bcf5e3976…

MALICIOUS

PDF

118.4 KB Created: 2021-03-21 01:32:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c2202027b5745bcc4d2e6a3d77b4d4b6 SHA-1: 95a38833b02f43770e0dc3ddff8d1de26de3dea0 SHA-256: 3bb55e5bcf5e39762cd9c2ea9318c9374074b9c4c06ec1aebeef210e39120b79
186 Risk Score

Malware Insights

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

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 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://xezojetit.ru/strik?utm_term=the+ponies+sims+%25D1%2581%25D0%25BA%25D0%25B0%25D1%2587%25D0%25B0%25D1%2582%25D1%258C+%25D0%25BD%25D0%25B0+%25D0%25BC%25D0%25B0%25D0%25BA PDF link annotation
    • http://tonedomopoja.scienceontheweb.net/does_washington_state_have_any_travel_restrictions.pdfIn PDF document text
    • https://tawigijonepoter.weebly.com/uploads/1/3/4/0/134012415/3604725.pdfIn PDF document text
    • http://itmax.info/channel_2_news_houston_reportersc739g.pdfIn PDF document text
    • http://italia-doc.fun/litapukudezojzo1e.pdfIn PDF document text
    • http://latencfsrt.space/logigajujufatudesuzosozeonasl.pdfIn PDF document text
    • http://jukojadijomefar.medianewsonline.com/60721809802.pdfIn PDF document text
    • http://sell-toclick.online/mekoterakokabidenudx9rao.pdfIn PDF document text
    • https://ludalobupum.weebly.com/uploads/1/3/4/5/134528654/3794715.pdfIn PDF document text
    • http://vomamafawib.scienceontheweb.net/73845217435.pdfIn PDF document text
    • https://nozagovedenide.weebly.com/uploads/1/3/2/6/132682533/xaxofuzuf-wamuguzadevo-vasekoxa-texelux.pdfIn PDF document text
    • http://koteyarn.moscow/the_game_of_life_instructions_2016ssg8h.pdfIn PDF document text
    • http://akillidestekbasvuruformu.online/47042979192dku4t.pdfIn PDF document text
    • http://zhigina.ru/wall_street_journal_password_resetfca4j.pdfIn PDF document text
    • http://loveantravel.xyz/pefebepozunofn84ym.pdfIn PDF document text
    • https://nalokulomegeze.weebly.com/uploads/1/3/4/7/134758193/4b7cb6ab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a134ef9b-a212-4d8e-a35f-da3d896bbd40.filesusr.com/ugd/dadc92_8b8d00814b304707975417691b074d89.pdf?index=trueIn PDF document text
    • https://cf2e1f24-e5f1-4289-9567-3affce9c164e.filesusr.com/ugd/a4ea6c_8df5812b76124ffe927f6d5857ddc3a6.pdf?index=trueIn PDF document text
    • http://kuxemozoxabonag.onlinewebshop.net/zexisukasuxe.pdfIn PDF document text
    • https://667abc8f-92ca-45d9-bc9d-789c80a68858.filesusr.com/ugd/dcd78f_3f297f5293054a209a9287f8196f965c.pdf?index=trueIn PDF document text
    • https://50b7e5d6-ab0e-41ff-bbcb-47d024e5c277.filesusr.com/ugd/45d8ab_a3cfd37ee07a4f2f83d2d53c6328613c.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001798f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1798F 5440 bytes
SHA-256: 3c5695dd466bafbae223663dfaa153b9c6e6318f4fe7bb5adecf1d66e2e36732
font_01_sfnt_off00018c06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18C06 12020 bytes
SHA-256: 45e986595850e7f8350062afb94a89db52c0a907bc379bf7ef3bff3c8735e1ce
font_02_sfnt_off0001b4ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B4BA 16060 bytes
SHA-256: 503f5200e83b189a546b6c6e1d808633a9135186956fe76ff9bd78de3d91e3c6