Malicious PDF — malware analysis report

Static analysis result for SHA-256 19c567badc9ed08c…

MALICIOUS

PDF

81.2 KB Created: 2021-02-23 00:25:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 08c29d071e400188f3ee0d6bd3878817 SHA-1: ef851138d3b5871b126aeeeba8b5e1d0d04a241b SHA-256: 19c567badc9ed08c1e86dfad2fc2780e9983586ea9fb8ac5e3bef411f9975611
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The ML classifier also strongly indicated maliciousness. The embedded URLs and the nature of the heuristics point towards a phishing or SEO manipulation attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/strik?utm_term=pathfinder+iron+gods+review PDF link annotation
    • https://cdn.sqhk.co/wumerelup/jjfw7Fn/35390095197.pdfIn PDF document text
    • https://cdn.sqhk.co/buvaboda/Gijqljg/10898646748.pdfIn PDF document text
    • https://cdn.sqhk.co/gogojelawov/1liejbE/poe_elementalist_blade_vortex_3._12.pdfIn PDF document text
    • https://cdn.sqhk.co/takodabu/dhajdgj/47889791222.pdfIn PDF document text
    • https://memezuwiz.weebly.com/uploads/1/3/4/7/134702577/bikigapatodaxam_sozejofon.pdfIn PDF document text
    • https://cdn.sqhk.co/letijefa/fidhbhh/lizewoki.pdfIn PDF document text
    • https://cdn.sqhk.co/bovokolel/NhbkYD6/33386804868.pdfIn PDF document text
    • http://vsedlyatebya.xyz/auto_clicker_for_ipad_no_jailbreakuq2uv.pdfIn PDF document text
    • http://kieverts.xyz/college_biochemistry_study_guidew4jov.pdfIn PDF document text
    • http://pitushok.space/ruger_mini_14_serial_numbers_582rcdwf.pdfIn PDF document text
    • https://zarokosa.weebly.com/uploads/1/3/5/3/135300057/2005532.pdfIn PDF document text
    • https://tawatoxox.weebly.com/uploads/1/3/4/0/134018263/68e8821f1d19.pdfIn PDF document text
    • http://itfamily.info/hamari_adhuri_kahani_full_movie_download_hd_720p_filmyzillarvj7d.pdfIn PDF document text
    • http://kataeta.club/aw_tozer_knowledge_of_the_holy6etfq.pdfIn PDF document text
    • https://widegavadiwudux.weebly.com/uploads/1/3/5/3/135325068/magobonofuvogovukub.pdfIn PDF document text
    • https://cdn.sqhk.co/pajerelo/OIieUjg/84990112904.pdfIn PDF document text
    • https://tisemadu.weebly.com/uploads/1/3/4/3/134387657/jinafovitimug-masinipapupo-xojujetalija-kikodivu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fipegaz.epizy.com/whirlpool_cabrio_dryer_manual_wed8000dw4.pdfIn PDF document text
    • http://xewenofos.epizy.com/baptismal_class_manual.pdfIn PDF document text
    • http://nawupewiviziwik.rf.gd/54108792112.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_off000100ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100EC 5288 bytes
SHA-256: f2820a7aa334dfe8c8ae49b888e1e4544de46521e134a5a5993f780ac2ae0088
font_01_sfnt_off000112fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112FA 10604 bytes
SHA-256: d189fdecdb8400a6be2dc9310f6dc68e059732d92227b2c8cd847740e0594a05

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