Malicious PDF — malware analysis report

Static analysis result for SHA-256 05a27c0f531c0484…

MALICIOUS

PDF

79.0 KB Created: 2020-11-20 02:52:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 968e6dc0f19e190367d1526adcf83d25 SHA-1: 1cc483de962a4badcc550ce59ae5a03798cec68d SHA-256: 05a27c0f531c04841c9351b6618b44defdbb624cfd133b20b775b132956f4069
244 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link and a link farm on disposable hosting. The ML classifier and ClamAV also flagged this PDF as malicious. While no scripts were extracted, the embedded URLs and the nature of the link farm suggest an attempt to direct users to malicious or phishing sites, likely as part of a broader phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 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.
  • 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://traffmen.ru/123?utm_term=nudos+y+amarres In PDF document text
    • https://melesosinipedo.weebly.com/uploads/1/3/4/4/134475371/f7cca87acca6.pdfIn PDF document text
    • https://morurotefat.weebly.com/uploads/1/3/4/3/134317018/6468848.pdfIn PDF document text
    • https://murikupa.weebly.com/uploads/1/3/4/4/134481598/fegozakelugu.pdfIn PDF document text
    • https://zemonawajut.weebly.com/uploads/1/3/4/6/134688337/nitajebug-goxejosor.pdfIn PDF document text
    • https://rimofunoduw.weebly.com/uploads/1/3/4/5/134525219/23e636afeb66d4.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/xizaxamuxive.pdfIn PDF document text
    • https://kupubasurunasoz.weebly.com/uploads/1/3/4/6/134695217/7059320.pdfIn PDF document text
    • https://merigufut.weebly.com/uploads/1/3/4/3/134357701/peranaxikometir.pdfIn PDF document text
    • https://takijotirodone.weebly.com/uploads/1/3/1/6/131637658/wivokipirufuz_junurofovuviw_vuwasokibo.pdfIn PDF document text
    • https://bopiwode.weebly.com/uploads/1/3/4/3/134367631/429c665e.pdfIn PDF document text
    • https://tagelararejo.weebly.com/uploads/1/3/4/8/134846357/rukisum_zuneximimobu_rusazi_nadevogoroku.pdfIn PDF document text
    • https://juxupadozimufa.weebly.com/uploads/1/3/4/3/134388451/6f2169971f.pdfIn PDF document text
    • https://bagubabijotete.weebly.com/uploads/1/3/4/3/134319258/109dc5de.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/2546eb7a-f27d-473e-875a-817d474f6ef0/77867115038.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55d3248e-e9a2-4db7-918c-18a0f17e079d/convertir_de_a_word_editable_gratis_online.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_off0000f7c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C8 5012 bytes
SHA-256: 724cf6bf5017bae99b1a38f34a24e37fe39a5259abc22c4617cfcd99a41165be
font_01_sfnt_off000108c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108C7 11456 bytes
SHA-256: def106812d88043b6aaeea4d9b04a5a814f0339d9f46d035d47ba1118df259f1

Open this report in the interactive analyzer, or submit your own file for analysis.