Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a0e5f995afaf233…

MALICIOUS

PDF

83.5 KB Created: 2021-08-19 18:29:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 29d9ea8a9eb9f22884a2358d680e645c SHA-1: 2ac82f5e112c809881692bfc65189f4a027b744d SHA-256: 2a0e5f995afaf233d62447f4f4e2da4eb56e7ed8c9393e12f910ff95c22d1f98
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malicious content or phish for information. The presence of embedded URLs and the 'download button' heuristic further support a malicious intent to trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/e50fd2930b59ec799c0d98deebc7bb92/nijafedipelewutoj.pdf
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9edde3739---xiliguminadamizuzenavepi.pdf
    • https://citronel.com/userfiles/files/wovakelore.pdf
    • https://riolospettacoli.it/filesUploads/file/vumukedonixetemiva.pdf
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16088f101a5e0f---66372697325.pdf
    • http://globomax.eu/userfiles/file/9393359897.pdf
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/1143d0a8ea9e5c817e6939feda1e961a/16568742077.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f91e37282c5---xuwep.pdf
    • http://domario.ru/userfiles/file/vopadopefawopirezilit.pdf
    • http://www.valathors.com/ckfinder/userfiles/files/79241646500.pdf
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160802b938be92---2664852515.pdf
    • http://www.almansori-ye.com/almansorifiles/files/43887896464.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608565473cc1f---vafukadolukuluferuxi.pdf
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/86673be91aceda9ba9d0491779fe7242/32575825143.pdf
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16075524806430---22518422154.pdf
    • http://telegid.tv/userfiles/files/72297512953.pdf
    • http://starsunited.at/upload/files/65672388671.pdf
    • https://fotobolfestmeny.hu/mvc/userfiles/file/90373835474.pdf
    • https://murten-hotels.ch/userfiles/files/wororudubaxuluwule.pdf
    • http://devitohomesorlando.com/userfiles/files/19041313205.pdf
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5f5fcdd6f1---36288947060.pdf
    • http://exhibitionchannel.com/upload/vasavalafalabir.pdf
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1c5e8bf91---jewerokedanurazufunifubir.pdf
    • https://sofahatinh.com/upload/files/sudiwolopudimadisavexarig.pdf
    • http://lavalnerina.it/userfiles/file/23756689189.pdf
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee071641317---34921475690.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=pokemon+fire+red+randomizer+rom+operationidroid
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0a5.bin
3a3128379be426d9fb4eb84c05be8a862931366a34f61e02a22e6aaea9e574d2
pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A5 17380 bytes
font_01_sfnt_off00010df4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF4 16792 bytes
font_02_sfnt_off0001260b.bin
21e1590cecddfffb5ad76d94edf3921619aa0ebb9db03709cf00571e5c851798
pdf-font-stream PDF embedded font (sfnt) at offset 0x1260B 10600 bytes