Malicious PDF — malware analysis report

Static analysis result for SHA-256 570030aab0327cc6…

MALICIOUS

PDF

74.1 KB Created: 2021-10-07 06:05:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: c221843fb2d9247f15ac61393110ae2d SHA-1: bd9cd7a59e3596e312144e5c34921597cad3c8c8 SHA-256: 570030aab0327cc64776ba07c63de83f76f84310cd1a17ec049db8034d44b081
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to disposable hosting or compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection to these malicious URLs, which are designed to host phishing content or further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 https://drafthe.ru/uplcv?utm_term=how+to+get+charge+offs+off+credit+report PDF link annotation
    • http://edbiji.com/uploads/files/20210914180222_437881.pdfIn PDF document text
    • https://himarco.ir/basefile/himarcoir/files/turebitekakuja.pdfIn PDF document text
    • http://ameshamagazine.com/js/upload/files/64016129129.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/15711094778.pdfPDF link annotation
    • https://www.hinkler.com.au/application/third_party/ckfinder/userfiles/files/wamaralami.pdfIn PDF document text
    • https://basisangka.com/contents/files/89353717878.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/k7pniomclo17b1fr1sfvscvi3a/71728756046.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/161329100b7ae8---wawituweraloxedisenowosuk.pdfIn PDF document text
    • https://serviceservice.eu/userfiles/file/kufufuguz.pdfIn PDF document text
    • http://firmen-bekleidung.at/userfiles/file/42228234950.pdfIn PDF document text
    • http://detskypohar.cz/upload/file/lulexowazuluxivuropaxogoz.pdfIn PDF document text
    • http://christschoolblr.in/userfiles/file/44486026408.pdfIn PDF document text
    • http://thegioioto.store/upload/files/lukefuralusugi.pdfIn PDF document text
    • https://mokshadhamnepal.org/userfiles/files/76196561246.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b95f2de248---lonoximuwotitogakapogud.pdfIn PDF document text
    • https://orderpoet.com/ckfinder/userfiles/files/97213064810.pdfIn PDF document text
    • http://vinhthuan.com/upload/files/35636863407.pdfIn PDF document text
    • https://navoloki.mebel18.com/uploads/files/nikowixikekamoni.pdfIn PDF document text
    • http://ksiclub.org/projects/achievemore/admin/upload/fckImages/file/bebawawafovina.pdfIn PDF document text
    • http://www.sun-green.eu/ckfinder/userfiles/files/jujevur.pdfIn PDF document text
    • http://domki-kopalino.pl/pliki/gebevazizewejaxife.pdfIn PDF document text
    • https://worldpigment.com/image/upload/File/mixexejuzaxebuxatokasiv.pdfIn PDF document text
    • http://rosesrealtyhomes.com/userfiles/files/33427819570.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC130 15948 bytes
SHA-256: a2074b0d731f07c5eb607b8d271232e980a95a35e21008a4e6274c62117b41c5
font_01_sfnt_off0000e9c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C5 10824 bytes
SHA-256: 46e0de78ab320dfdbb46307a9710cdf172eed2ee661df1e3ec431ed907b6bf8b
font_02_sfnt_off000102bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1