Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dcb58f3b388f17c…

MALICIOUS

PDF

75.1 KB Created: 2021-03-17 02:38:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 029e47e2a7e65f818b71d56c5dbfba69 SHA-1: 127c7d9a23769b1debfe6fde0efaf30393f3f137 SHA-256: 0dcb58f3b388f17c3c96be62d228ee7ec272c84f1cb392b964120054cd34994a
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

This PDF file exhibits characteristics of a link farm, containing numerous external URLs pointing to other PDF documents. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for SEO manipulation or to distribute further malware. The primary attack pattern involves embedding a large number of external links, some of which are on disposable hosting, suggesting a coordinated effort to distribute content or potentially malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://soxebez.ru/wix?keyword=lds+new+testament+study+guide+pdf PDF link annotation
    • http://loduwij.scienceontheweb.net/gezopemovorobe.pdfIn PDF document text
    • https://cdn.sqhk.co/dewavasese/RhfVhcV/bakajudokature.pdfIn PDF document text
    • http://fevozogu.iblogger.org/valentine_day_song_mashup_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/futogifoku/T6ighiJ/38991281591.pdfIn PDF document text
    • https://lekakuvikel.weebly.com/uploads/1/3/1/3/131380005/fiwusenosuz.pdfIn PDF document text
    • https://joposiga.weebly.com/uploads/1/3/5/3/135399072/20c1d397bd.pdfIn PDF document text
    • https://cdn.sqhk.co/fikalibumi/ggghdja/45836691383.pdfIn PDF document text
    • http://rivokalodusi.sportsontheweb.net/al_bukhari_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417408/normal_60236070c578e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413362/normal_60147049c1853.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/babcc709-89e8-4312-a0d6-d90b2c60660d/how_to_install_coffered_ceiling.pdfIn PDF document text
    • http://boripodadup.epizy.com/bipaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0eec88ad-652d-4614-bbec-67fc3bdb92d9/how_to_get_splat_hair_dye_out_of_your_hair.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dbcd1ce-6cfc-4b4b-add2-6f4ad1149989/dunkin_donuts_frozen_coffee_calories_large.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21557a13-f3a5-45e5-a283-1a416a658d5e/9742663098.pdfIn PDF document text
    • http://wixudilasajigil.rf.gd/horizonte_perdido_1973.pdfIn PDF document text
    • http://bufijonewufo.onlinewebshop.net/jewufokunawawoguxaloxum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7ffd541-a6ca-492e-bf4f-667326426ead/mazabedeta.pdfIn PDF document text
    • http://gekolutewubel.myartsonline.com/90422289632.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_off0000e73b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE73B 5368 bytes
SHA-256: da8cf8aba89d4ee06e4fd251b48f5c97cff8784a507795df6a019d101bd47d20
font_01_sfnt_off0000f996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF996 10616 bytes
SHA-256: ceb08cd7219443c710e16de783c45a7ec6c41690c7aebf06629e77e7cf80da72

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