Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c46047d98e11c8f…

MALICIOUS

PDF

81.3 KB Created: 2021-03-18 07:07:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7849f3f649e9af0fd30c211e80f882fc SHA-1: d74ba586f9833867fbebfe95255939820bbb15cb SHA-256: 7c46047d98e11c8f58838267428cbf45d5fd802c870a5afc67dd7f23b4e0f4f1
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are obfuscated or lead to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for distributing further malware or conducting phishing operations. No scripts were extracted, but the presence of numerous external URIs points to an attack pattern focused on redirecting users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vilenefex.ru/strik?utm_term=summer+infant+wide+view+baby+monitor+instructions
    • https://cdn.sqhk.co/jutigurotow/RZjhRWE/tiripegisipokewajelu.pdf
    • http://komozazene.getenjoyment.net/cadena_de_coros_pentecostales.pdf
    • https://cdn.sqhk.co/doxurozupu/hgchcCf/perseid_meteor_shower_tonight_california.pdf
    • https://cdn.sqhk.co/lojavowi/keXJIAY/44266986277.pdf
    • https://cdn.sqhk.co/julubesaf/gi6ihie/23897697061.pdf
    • http://tramlaweq.online/97103908104wse6p.pdf
    • http://idealica-co.site/what_style_of_poem_is_the_raven8mzrv.pdf
    • http://in-step.shop/jidoxorokewuludumesovumujtg.pdf
    • http://persequenteamsohbet.com/pupesoxancl0.pdf
    • http://palejep.22web.org/auschwitz_book.pdf
    • http://spoonnumberone.xyz/3550108383b5b8m.pdf
    • https://cdn.sqhk.co/litazujizime/vjhiaGL/cetusplay_remote_apk.pdf
    • https://cdn.sqhk.co/zizenozi/giM0ifa/buzzards_bay_house_of_pizza_coupon_code.pdf
    • http://govuled.mywebcommunity.org/72222058385.pdf
    • https://cdn.sqhk.co/sozonexof/hxuih2O/wanaxajiralapulifimok.pdf
    • http://bezigex.iblogger.org/tabojojezup.pdf
    • http://metinozub.iblogger.org/events_listing_website_template.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fa90eb46-aa9b-4fd1-a2e8-e903ec8e50a4.filesusr.com/ugd/575fb0_31c8bc3b266245659562df9654440742.pdf?index=true
    • http://xakazasaravi.onlinewebshop.net/propiedades_fisicas_y_quimicas_de_los_alcanos.pdf
    • https://0e098354-e5d1-4afc-9be7-763a70ae5e44.filesusr.com/ugd/ef253e_7ad2a79c0a614eb29f7fd4c43d2e022e.pdf?index=true
    • http://xokifenutotumu.epizy.com/17508833287.pdf
    • http://kesurodijafezup.rf.gd/hp_p1102_toner_original.pdf
    • https://70848fb0-0fd0-490a-9360-2ffa38fc212c.filesusr.com/ugd/08e331_97cdf26935ba435581300d95f7128664.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdc1.bin
7e927b9708c1a0bb803c53efcc1a05a8836889f7fd851be5ffa05ab913d287e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC1 5632 bytes
font_01_sfnt_off000110ed.bin
28d2c3f1dd0d9b0d638291a62e58aa0191ddd74aed2d35962ddcca7d0559a5cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110ED 11336 bytes

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