Malicious PDF — malware analysis report

Static analysis result for SHA-256 62a71cdb65895eaf…

MALICIOUS

PDF

72.3 KB Created: 2021-03-07 04:28:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 347c7649e4e4aec48bea42530be25f38 SHA-1: 89a1b1ad6e1091b083fdb5457eb887ddff03852e SHA-256: 62a71cdb65895eaf1052a90dd1e6f1b8a22abb2d7370363da42af27df1e381d5
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of a URL with a search query term indicate an attempt to trick users into visiting a malicious site. ClamAV detection and ML classification confirm the malicious nature of the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/strik?utm_term=how+do+i+set+my+citizen+eco+drive+nighthawk PDF link annotation
    • http://lezigovedavide.getenjoyment.net/54110658446.pdfIn PDF document text
    • https://cdn.sqhk.co/ninasodivofi/d5whfzp/electrical_engineering_calculation_formula.pdfIn PDF document text
    • http://itdomen.fun/lebunuqwue8.pdfIn PDF document text
    • http://taforojujutusig.mygamesonline.org/nixanumepuberewafo.pdfIn PDF document text
    • http://tapopapebesawu.getenjoyment.net/54383593261.pdfIn PDF document text
    • http://sipataj.sportsontheweb.net/13344150850.pdfIn PDF document text
    • https://cdn.sqhk.co/sixepatexup/5Thco5i/nerorilunewafot.pdfIn PDF document text
    • https://cdn.sqhk.co/jimatoju/ghjahj7/41271521782.pdfIn PDF document text
    • http://roskycnmx.com/58522451403irw7m.pdfIn PDF document text
    • http://zoomita.fun/campbell_biology_2nd_editionifqwc.pdfIn PDF document text
    • https://cdn.sqhk.co/bukevexej/ieqNjir/81630074964.pdfIn PDF document text
    • https://cdn.sqhk.co/loganidob/T6hidJr/vr_escape_game_apk_mod.pdfIn PDF document text
    • http://idealica-italiaoficial.site/zogamamubodalivuyxgs9.pdfIn PDF document text
    • https://cdn.sqhk.co/tibatojo/jcNiRga/my_idle_city_apk.pdfIn PDF document text
    • http://freshmind.net/how_to_get_salvation_army_christmas_assistanceuok8y.pdfIn PDF document text
    • http://kitafoged.medianewsonline.com/1957231910.pdfIn PDF document text
    • https://cdn.sqhk.co/xovikojux/23yibdG/ricetta_omelette_salate_prosciutto_e_formaggio.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/0c1ea115-8e7f-4bcb-928a-45f96d4a7b75/67751879127.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c4f85f9-83c3-4c74-911c-be93a11994b1/manual_iomega_storcenter_ix4-200d.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/229f86ea-4571-44b8-9fb2-1dc0e64e009f/dapple_dachshund_puppy_for_sale_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/769942d7-7b15-4da3-a79e-67d647815b61/gta_v_codes_pc_2020.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_off0000dbdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBDF 5648 bytes
SHA-256: 5217ff99283ae106fad86715356311d340292df744b0175236a5e1cb2d8ee931
font_01_sfnt_off0000ef0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0D 10736 bytes
SHA-256: c138ab68c7cc1ba828ba88b0afd0f651f9458eadfc1bda62bc5c7406c7de272b

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