Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6f5a940becf9078…

MALICIOUS

PDF

85.9 KB Created: 2021-07-07 03:13:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ee16a0e81265f3a3be4c9717c7f951a7 SHA-1: 31e159c5d3f283f9cadad86eb98ec8718d89faf8 SHA-256: f6f5a940becf907878263002b9b0ca8cb0002a89e6e88e21050885c5b2a8b87f
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for delivering malicious content. It also contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://carscaso.com/js/upload/files/94011425983.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9eccb4ba8---17606575660.pdf
    • http://gulfcoolcontracting.com/uploads/userfiles/file/file/24322338913.pdf
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/kf5j53hds8gjq6utr9p3mk8gtf/zunonuruxekiten.pdf
    • http://agro-pasz.pl/ckfinder/userfiles/files/8449758917.pdf
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/9r1cvio7kn94r1i1pq9joqadt5/82923092764.pdf
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e3c5b9307---zimapojixubojogofuro.pdf
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/55e18fda7a2cf2bd58fd6bddce23e9ee/29302031928.pdf
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/fe1e4aa9715de620df2af58e29417232/zidewepetimaja.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3976566f8---26458010316.pdf
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a64d249a224---piroxukabesamezetogaza.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160811d247801b---jarijebavi.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/hg7gaaipo19i14mkpj36q7plr5/87141843044.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5b6c3aca1d---72969493819.pdf
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/22f1943f9279a03836789df9f4cd9c1d/peseginurimutulagabudot.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9a22d4503a---zepovofawasok.pdf
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/3eh6d9055j3pc9knv2t455p3e0/fafopakujigixape.pdf
    • http://skyrunarser.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/210616051309169986fvja6m.pdf
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/tkeoui9hecp1pcigt2u5voib64/73614082843.pdf
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/hv6e9vvbtgdrbm71nfsh52acij/9860347661.pdf
    • https://eldorado777.ro/upload/editor/file/28402840031.pdf
    • https://saleskerala.com/ckfinder/userfiles/files/daxufu.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc83aa452c5---gipujelujukevofeler.pdf
    • http://diysmart.net/userfiles/file/tuperoduwokitatixugatewo.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=nfhs+fundamentals+of+coaching+test+answers
    • 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_off0000eb8a.bin
5aaeb0d3cfdca5a875b5e130e773a85686ecb1a087a1528b5b72a6ca5b462e7c
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8A 17352 bytes
font_01_sfnt_off000118a0.bin
4281fcee5ddd3f6b97bc855e0dcd2a9b75f42696a1e409b44aa32a6f8589b036
pdf-font-stream PDF embedded font (sfnt) at offset 0x118A0 11088 bytes
font_02_sfnt_off00013221.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13221 16792 bytes