Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a079068a225fa5d…

MALICIOUS

PDF

84.8 KB Created: 2021-06-28 10:53:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8c7046bcb165f9574dfb54519a254580 SHA-1: 93a083bbf0ba556ff93d35ef8cf30c0c047eb26b SHA-256: 1a079068a225fa5d0c6d166239fc97833f4359bc2ff27593e89d148fd45597cf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous links pointing to websites hosted on compromised or disposable domains, indicative of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of multiple PDF link farm heuristics further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • 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.
  • 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://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/889d70c55c8b15149784cb564f3dcca1/wivase.pdf
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8690b7955---xigesejetapoma.pdf
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/b29e8c0b97409a33f936c52d3b89a08e/kemiwaxejitokutujuzuzav.pdf
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a520ba72692---75724858520.pdf
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608723f62cb17---10470789467.pdf
    • https://fundreamz.com/ckfinder/userfiles/files/tixujaputo.pdf
    • http://khiconghoixuancong.com/Khicong/admin/userfiles/file/xozasezolemux.pdf
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bd0ed812cba---60069521782.pdf
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb282389ab---lidonafawukatot.pdf
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/0rl0l3ggjvgp8496cmr0imn6rg/wepusonud.pdf
    • http://thaoduocquyhiem.com/userfiles/image/file/minemijoboxusirasutoxiteb.pdf
    • http://reicar.dk/userfiles/file/selorajawija.pdf
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e9d2c5da88---luxezedafaripelutur.pdf
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/fbh67jpet0uh6ve5rp37dpvmvo/dizerovotesemabotewufito.pdf
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/ulv5o88pqq7b2qk5iapk7n5img/8432124193.pdf
    • http://xn--80aaae7amexjfdlfdfg.xn--p1ai/files/file/80845207240.pdf
    • https://dacinsara.ro/fckfiles/file/fapevuzijariv.pdf
    • https://vietnaminsight.biz/ckfinder/userfiles/files/vidoneliwijit.pdf
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9c430d8740---suzomikisemagovasabir.pdf
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608941cfa6150---gaziwufelegadinajijod.pdf
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/e70a5da12d1f8ddcf03ac59e2d270fc4/94831238224.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/ad9557d5843ae3efaeaabaf040bb6dcf/wutugavawivegebojenus.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=dyslexia+is+what+type+of+disorder
    • 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_off0000eaba.bin
329f2ab601e3ec627a694b45383230510df20bfa747fb75b8580affb83cfbc65
pdf-font-stream PDF embedded font (sfnt) at offset 0xEABA 16340 bytes
font_01_sfnt_off0001150b.bin
a838e3568e6a61d8c6be67c265d8945e0d74ef660dd48422982fcde4e600b658
pdf-font-stream PDF embedded font (sfnt) at offset 0x1150B 10796 bytes
font_02_sfnt_off00012e21.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E21 16792 bytes