Malicious PDF — malware analysis report

Static analysis result for SHA-256 421ca29cb3a2c07b…

MALICIOUS

PDF

84.3 KB Created: 2021-04-07 18:59:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 489fa9e661cd9ef125e5f3805246146a SHA-1: e67dd236470f5ab6d773670358a50d876c0fb127 SHA-256: 421ca29cb3a2c07b0559bf02055a43b14c1fed828c8b306bb3fd3e6ed0d21f58
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 0.9997

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://xajibur.ru/strik?utm_term=wa-2608+tv+antenna+installation PDF link annotation
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • http://italylife.pro/dusk_till_dawn_piano_karaokezod7n.pdfIn PDF document text
    • https://bujasosepamus.weebly.com/uploads/1/3/4/6/134626994/sasidajewodixavubeti.pdfIn PDF document text
    • http://freud.icu/854607935435ps46.pdfIn PDF document text
    • http://golosa-spasibo.ru/what_is_the_difference_between_2016_honda_civic_lx_and_ex7ns0g.pdfIn PDF document text
    • https://zibekasosux.weebly.com/uploads/1/3/4/0/134040395/86f75ec4233d.pdfIn PDF document text
    • https://robivobaxo.weebly.com/uploads/1/3/0/8/130873737/dipupurezula_volavenas_naresugepa_tofedabuwakoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412592/normal_5fd625331f92a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473938/normal_6019c8df304de.pdfIn PDF document text
    • https://wijodemarivupi.weebly.com/uploads/1/3/4/8/134861972/933410.pdfIn PDF document text
    • http://kowesawu.iblogger.org/sikoped.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449600/normal_5ff9f9a3ddeb0.pdfIn PDF document text
    • http://golden-bridge.pro/1210221372tjgb1.pdfIn PDF document text
    • http://9gusevshop.space/kuzovrsms9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fc28dbb-22be-47ee-bca3-c40d1744e7bf/brookstone_desktop_true_wireless_speakers_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c865db0d-7858-48c4-a800-a3f1db941c8d/how_much_does_it_cost_to_mail_something_internationally.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ed47aec-96fa-4559-8ffd-6ad7840101ab/skate_space_online.pdfIn PDF document text
    • http://xapimiwosusuv.epizy.com/fox_entertainment_tv_guide.pdfIn PDF document text
    • http://vudasuluwiviwaj.rf.gd/vacuoles_structure_and_function.pdfIn PDF document text
    • http://boxalage.epizy.com/81512510095.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13d3095a-c8fb-4ded-9b5a-072527c35a0b/nawixobodadipexozono.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_off00010ceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CEB 5308 bytes
SHA-256: eb3dde342008b812bb8320fe7913de65ffe33063b0d3c38a5f82724a7a1da57d
font_01_sfnt_off00011f27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F27 10836 bytes
SHA-256: a1df46999ca6efd417a4930534e226da25569bbc1ecf10cfa07beafeb5631048

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