Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e2204932cf551c4…

MALICIOUS

PDF

79.1 KB Created: 2021-04-20 09:01:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 15f57e15808bce90e051ff8976c74ddd SHA-1: c1b6acc8ce318a6fb73d315fe64470128d03e685 SHA-256: 8e2204932cf551c43237e899537e13141cfbf3c24b4afc3561bf5337e90f2b3e
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with several pointing to known malicious redirectors and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=what+is+the+easiest+day+trading+strategy In PDF document text
    • http://jisetatiloro.scienceontheweb.net/tixoretagizub.pdfIn PDF document text
    • http://praktika-ingenieur.com/accounting_information_systems_and_internal_control_2nd_editionaxm04.pdfIn PDF document text
    • http://tavegumata.sportsontheweb.net/868254968.pdfIn PDF document text
    • http://hightrade.club/how_to_calculate_gas_velocity_in_a_pipejztw4.pdfIn PDF document text
    • http://xuwuvewisin.mypressonline.com/78107953503.pdfIn PDF document text
    • https://fulopovesaj.weebly.com/uploads/1/3/0/7/130740112/bebotabesogi_zatifokebezenan_fajuxu_vajudiju.pdfIn PDF document text
    • http://gofadivus.mygamesonline.org/municipal_solid_waste_management_system.pdfIn PDF document text
    • http://figimumagoko.mygamesonline.org/zonojabim.pdfIn PDF document text
    • http://nebofimanigi.sportsontheweb.net/rodutubekidirune.pdfIn PDF document text
    • http://bottlechainworld.com/microsoft_edge_home_page_news29isf.pdfIn PDF document text
    • https://puvovajol.weebly.com/uploads/1/3/4/0/134040332/mixila.pdfIn PDF document text
    • http://mon-cmso.best/simcity_4_deluxe_product_keycrkz0.pdfIn PDF document text
    • http://karma-911.com/ac_joint_pain_exercisesi8clc.pdfIn PDF document text
    • https://kajuzenutojaso.weebly.com/uploads/1/3/4/6/134631714/medig-xamam-worenalifuba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://givetupazowo.onlinewebshop.net/gevitisinujitinepokovo.pdfIn PDF document text
    • http://zibelasavu.atwebpages.com/pdf_brochure_toyota_chr.pdfIn PDF document text
    • http://duvodix.myartsonline.com/best_short_novels_goodreads.pdfIn PDF document text
    • http://pofijiserige.onlinewebshop.net/17913007996.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_off0000f76a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF76A 5168 bytes
SHA-256: ee37f7eacfd8beafb6c4dff2e0286c1e75520113476723233312c329459f8520
font_01_sfnt_off0001090d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1090D 11256 bytes
SHA-256: 60c8e0c3a307f76fba4a75ba06242c97b1b083ae51fe9fb56fc9dbb3a01a8384

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