Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d1fcb911e320453…

MALICIOUS

PDF

75.2 KB Created: 2021-04-06 08:12:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f85da17c7a83a449c3af9616b61af978 SHA-1: c293e560282c813beff91f040ee702b61a05b1d7 SHA-256: 4d1fcb911e320453e7e790cbe755ca0e53c3adaa4d1d9e1438e3b928579d304c
126 Risk Score

Malware Insights

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

The sample is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan. It contains an embedded URI pointing to a suspicious domain, xezojetit.ru, which is likely used for phishing or to serve a malicious payload. The PDF's structure and content suggest it's part of a social engineering attempt to redirect users to this malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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 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=graco+pack+%2527n+play+bassinet+insert
    • http://tujubafi.getenjoyment.net/48318934023.pdf
    • http://yachtcharter.group/smart_calling_appiaec7.pdf
    • http://tiwimifozukimu.medianewsonline.com/96913017467.pdf
    • https://midubumiw.weebly.com/uploads/1/3/5/9/135989619/9029148.pdf
    • https://xitukamobem.weebly.com/uploads/1/3/4/6/134643312/depowezude.pdf
    • http://lagidonak.mygamesonline.org/poultry_definition.pdf
    • https://gifivetusox.weebly.com/uploads/1/3/4/7/134736849/d9b1c9b1923439.pdf
    • http://lovemecompletely.com/91992978014neu84.pdf
    • https://fakanodadix.weebly.com/uploads/1/3/4/3/134371587/287a23c2cf8444b.pdf
    • http://qiwi-wallet.online/how_much_horsepower_does_a_farmall_super_c_have6l985.pdf
    • http://vivekawiga.sportsontheweb.net/jumping_spider_life_expectancy.pdf
    • https://tidevaxapoled.weebly.com/uploads/1/3/5/9/135971763/kemamifebi.pdf
    • http://begavud.iblogger.org/99583940417.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ad48a31c-d0eb-412d-9874-9d38498ecbe2/resabegurelu.pdf
    • https://uploads.strikinglycdn.com/files/3cd9e1ef-157a-4327-8ff4-2ed64ddb6f30/munexivorurogaz.pdf
    • http://pabotojixupi.atwebpages.com/barogoxomaminusa.pdf
    • http://wemixapaw.epizy.com/tojuzebugagazunatopanoko.pdf
    • http://lafodinozaz.rf.gd/amsco_apush_answer_key.pdf
    • http://mevafedepuneka.rf.gd/41242557348.pdf
    • https://uploads.strikinglycdn.com/files/47520b5a-1a1f-4c4d-88d2-6c44246a3b1b/percy_jackson_1_letlts.pdf
    • http://tibutariwu.myartsonline.com/norme_afnor_z44_005.pdf
    • http://fubavinexazixo.onlinewebshop.net/evenflo_symphony_sport_all-in-one_car_seat_installation.pdf
    • http://bitujiduruv.myartsonline.com/78164606493.pdf
    • http://foxukekamusun.onlinewebshop.net/edital_prf_2020_cespe.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e623.bin
64758bc62ed3cab7e5620b97c90696238de90bf94c15a30dc747e8b8e2951b03		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE623 5300 bytes
font_01_sfnt_off0000f847.bin
3ecfd08322ef2c297c5f9461f600013f57de85aabfe472724d167013af7f899d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF847 10828 bytes

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