Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f0f54c658be5245…

MALICIOUS

PDF

84.6 KB Created: 2021-09-18 03:55:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: df7a7560af84ccfbd787883d91f1e090 SHA-1: 5eba728ff4f3ea7a935a165d3d860347b4f66351 SHA-256: 6f0f54c658be5245e8d218f074f5f778162ba21b8192058b10b57fd7451ef081
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1140 Deobfuscate/Decode Files or Information

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains embedded JavaScript and numerous external URIs, many of which point to potentially disposable hosting. The heuristics indicate a lure for password-protected archives and MFA/one-time code harvesting, suggesting the document is designed to trick users into revealing credentials or downloading further malicious content. The embedded JavaScript likely facilitates this phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://horacebatten.com/ckfinder/userfiles/files/mabafupig.pdf
    • http://xn--80akoseq9f.xn--p1ai/userfiles/file/kovud.pdf
    • http://italianopizzeria-pg.com/uploads/files/61537536157.pdf
    • http://sambometal.com/dataroom/file/jiluburaluvovumofufadas.pdf
    • https://middletonchambers.com/ckfinder/userfiles/files/kopen.pdf
    • http://qapoll.com/2015/vat/upload/files/82157137075.pdf
    • http://knipia.com/userfiles/file/busul.pdf
    • http://neoneofitou.com/ckfinder/userfiles/files/vavatariwomexojulon.pdf
    • http://maezawa-jidousha.com/js/upload/files/ziriturabusad.pdf
    • http://www.siposferenc.hu/html/ruvupawoluvusakowubob.pdf
    • http://www.almansori-ye.com/almansorifiles/files/61695761380.pdf
    • https://grupahatak.pl/admin/_fck_files/file/fofow.pdf
    • https://illinoisfiscalpolicycouncil.org/app/webroot/userfiles/file/pupisuvusikolav.pdf
    • http://mbfeed.vn/upload/files/25262197403.pdf
    • https://www.truck-transport.com/ckfinder/userfiles/files/tepawifufasutotuvepuzoba.pdf
    • http://pantipplaza.com/userfiles/file/68555558457.pdf
    • http://remont-etalon.ru/upload/files/93753545245.pdf
    • https://wsbtitan.com/images/file/50754842719.pdf
    • http://somkuthyoptika.hu/editor_up/zafumakewula.pdf
    • http://www.mariabeckmann.com/fotos/uploads/files/82266617595.pdf
    • http://sino-web.net/filespath/files/20210913123056.pdf
    • http://labradory.pl/file/kafepukarevoxixapuzamipof.pdf
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/161427179f02cb---gujupaweduferuzawa.pdf
    • http://nghieuphong.com/upload/files/gipadudibugo.pdf
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613dbc049bff4---28237973048.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=how+to+unlock+a+samsung+galaxy+phone+password
    • 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_off0000e409.bin
bb986a0206ac09a7dd5242f1e77fab33d0018a9276015bf673711db2fbf0b5aa
pdf-font-stream PDF embedded font (sfnt) at offset 0xE409 17844 bytes
font_01_sfnt_off000111fd.bin
22fc3ff31751b67b8f7eda3cde8646f2ce595f39873f80052e40dca1bb753cc0
pdf-font-stream PDF embedded font (sfnt) at offset 0x111FD 11356 bytes
font_02_sfnt_off00012c71.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C71 16792 bytes