Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ace020eacc1bcb1…

MALICIOUS

PDF

119.9 KB Created: 2021-02-26 01:30:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fcdaf442d6b449290f5b26bc7114e4ee SHA-1: bd734a69a363b2fdf863373562b71fbcc2a0f062 SHA-256: 4ace020eacc1bcb176ccfeaef5702e65512af5d25610155c211478590b57563f
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, suggesting it is part of a link farm designed to drive traffic to potentially malicious or phishing websites. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external URIs point towards a phishing or SEO manipulation attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://seumenha.ru/strik?utm_term=how+old+do+you+have+to+be+to+get+your+driver%2527s+license+in+arkansas
    • https://jexafowasefuxuv.weebly.com/uploads/1/3/4/5/134588667/vogokijewosife-pipuvemivewuj-dopodare-dedagit.pdf
    • https://lurufakezudaka.weebly.com/uploads/1/3/4/8/134884294/rapine.pdf
    • https://cdn.sqhk.co/vasibejovej/hi7qhdo/robo_defense_full_version_free_download.pdf
    • http://dafagaketa.sportsontheweb.net/gesonelitivaxukati.pdf
    • https://zekabijixakosu.weebly.com/uploads/1/3/0/8/130813896/kotulumafu.pdf
    • https://static.s123-cdn-static.com/uploads/4415068/normal_6002987d26a06.pdf
    • https://gatakuluva.weebly.com/uploads/1/3/1/8/131856326/rufezupu-vigug-rudorek.pdf
    • https://cdn-cms.f-static.net/uploads/4465392/normal_602ab635f24f4.pdf
    • https://cdn.sqhk.co/nufomewo/gichhjc/online_auctions_houston_texas.pdf
    • https://static.s123-cdn-static.com/uploads/4380211/normal_600108aadb4c5.pdf
    • https://cdn.sqhk.co/bafiweba/QqL1jdK/13793829448.pdf
    • http://sevezor.scienceontheweb.net/how_to_change_nutone_light_bulb.pdf
    • https://cdn.sqhk.co/volakase/ggieR1u/zawejozukufikinerunif.pdf
    • https://samoderusewon.weebly.com/uploads/1/3/1/3/131383586/jogupanexa_luteb_xupomev.pdf
    • https://kapebuzuzevasa.weebly.com/uploads/1/3/4/5/134587117/e49b58915.pdf
    • https://dazifonawifebi.weebly.com/uploads/1/3/4/7/134763946/e3933000c.pdf
    • http://mevukavotidu.getenjoyment.net/libro_poder_de_orar_de_madrugada.pdf
    • https://vidokabotofasi.weebly.com/uploads/1/3/4/8/134868814/c1295aee88c4b1.pdf
    • http://vowufijetapiko.sportsontheweb.net/witcher_books_vs_games_timeline.pdf
    • https://static.s123-cdn-static.com/uploads/4407552/normal_6008fb7a71532.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0001937d.bin
2bb6b37f47ab37ba6f7a40c222b8cc4cf05fa07613b6b479fe2969b78d938d53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1937D 5656 bytes
font_01_sfnt_off0001a6d9.bin
c6e4ce1db5ca800ce1d08749f9c7136dd8ae55053e8d8e1c83705a0999baafb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A6D9 12732 bytes

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