Malicious PDF — malware analysis report

Static analysis result for SHA-256 45aadc7f13ce885f…

MALICIOUS

PDF

94.8 KB Created: 2021-06-26 03:30:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b01487eac7d53dcb9d4b4a1d15f14eb8 SHA-1: b41c8b3f36522da9bfeb6ffd8a91dd7265e4c989 SHA-256: 45aadc7f13ce885fc978a132e52a9db4d6ef704d67d30e4a111aeafa497ef321
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055 Process Injection

The PDF contains a link farm with numerous URLs hosted on compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of multiple external URIs and link farm heuristics points towards an attempt to lure users to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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 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.
  • 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://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/319065cc993574619eb4041481d17ba9/laxelamelenufevixa.pdf
    • http://nessium.net/userfiles/file/1734444285.pdf
    • http://1960vonsteuben.com/clients/d/df/dfb5e1b83ea85bfdc5ef1da934264264/File/90400114586.pdf
    • https://eastmanllc.com/ckfinder/userfiles/files/87382805835.pdf
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609041ae642bb---falejemaxerosut.pdf
    • http://webinaris.net/ckfinder/userfiles/publics/files/nitivosulowelafejolodokar.pdf
    • https://thinkglobalcompliance.com/ckfinder/userfiles/files/20491930280.pdf
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/ef95954271119a9987311ac58df3d190/85022807789.pdf
    • http://alituncer.com/userfiles/file/lemovero.pdf
    • https://dienlanhbachkhoa.info/upload/files/miwilamuxowifitogodefavun.pdf
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160d661280b7d3---38908990205.pdf
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/6216a5df5e37e9ddc1c8fcd133cbc1ac/80594300794.pdf
    • http://specimport.by/files/files/vuvivafunow.pdf
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160b4902d625af---66167844066.pdf
    • http://huile-de-nigelle.info/userfiles/file/kudopobadubudilekada.pdf
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607760e58956e---22600071947.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c93ae67be76---jifokokorar.pdf
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/104c78f75a9f15e7e0477d2830025766/delolabewuwuk.pdf
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160aa8d3750d84---paxapamoxijilipoluxen.pdf
    • http://ventilatoryzlin.cz/images/file/badodizufe.pdf
    • http://silverleafspa.ca/clients/10619/File/85349510175.pdf
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/cdb9266959d84df3d8565ebc27d951d0/zabojowinadapizirozulef.pdf
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/f0mo1vh8t19sth0c888loq4ut5/fepazemu.pdf
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/hnpckjccr6g0hn8tvmd8j1nmn7/lulut.pdf
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad0aec2f8a---nonagubevokamegadupi.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=commercial+poultry+production+pdf
    • 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_off0001105d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1105D 16792 bytes
font_01_sfnt_off0001286f.bin
bcd0780bc5fee3b0d9f32d06436919af697aa99402ea5703e94bfa8f19ef42b1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1286F 16932 bytes
font_02_sfnt_off000154bd.bin
d75f397e05cf3b2344f3388df9634014e13f98d9fe60896452738b5bafe9659f
pdf-font-stream PDF embedded font (sfnt) at offset 0x154BD 10860 bytes