Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d081c8b6ad347de…

MALICIOUS

PDF

62.3 KB Created: 2021-09-28 23:30:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 56139e36113caf3800a66dcd04d859b9 SHA-1: 6d07d2327f2ebce9d889cbf273a457d57a3c13f0 SHA-256: 7d081c8b6ad347debd5a105790714ce6e592c0b80c8d57a60ef35074b7ebbdbf
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs pointing to various domains, many of which are associated with link farms and disposable hosting, indicating a phishing or scam lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7398

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://crysiq.ru/uplcv?utm_term=3d+mathematical+shapes PDF link annotation
    • https://shian-jin.com/UserFiles/files/85519898701.pdfIn PDF document text
    • http://ptsound.com/plugins/ckfinder/userfiles/files/6680817634.pdfIn PDF document text
    • http://espwireless.net/uploads/file/37416740247.pdfIn PDF document text
    • https://bazk.info/public_htmluploads/file/jiludixusapirawazav.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161378260876d1---nifez.pdfIn PDF document text
    • http://sovaimm.it/userfiles/files/83487969650.pdfIn PDF document text
    • http://nktrading.qa/file/files/wozuw.pdfIn PDF document text
    • https://kolkatanagariksammelan.org/ckfinder/userfiles/files/jaxizekofedexus.pdfIn PDF document text
    • http://bakersfield.thepokeluau.com/uploads/files/6048633826.pdfIn PDF document text
    • http://bestpokeya.com/uploads/files/roxetodenarowiwanupusun.pdfIn PDF document text
    • http://attep.com/home/sandbox/domains/heekee.com.hk/public_html/ckfinder/userfiles/files/dabefafegopixibisovobidak.pdfIn PDF document text
    • https://lrsinc.co/userfiles/file/31435758332.pdfIn PDF document text
    • https://geya99.com/ckfinder/userfiles/files/tezove.pdfIn PDF document text
    • https://spvi.cn/filespath/files/20210925085011.pdfIn PDF document text
    • http://ser-buk.com/userfiles/file/70665855046.pdfIn PDF document text
    • https://comfortinnbarrie.com/phpsites/vertical_living/uploads/file/betivexafimonetitivubati.pdfIn PDF document text
    • http://gurgaontaxi.com/pa/trainstation/uploads/image/file/bowuxajififu.pdfIn PDF document text
    • http://mispuntossaga.com/campannas/file/nowipabofoseme.pdfIn PDF document text
    • http://vrieshorst.nl/images/uploads/file/11352723087.pdfIn PDF document text
    • https://bagstyle.uz/images/file/jaguku.pdfIn PDF document text
    • http://mastrodibaglio.it/userfiles/files/36291770399.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/10386af96d862f6f1c85d803547326c7/70554325167.pdfIn PDF document text
    • http://jobcred.com/rk/jobcred/uploads/image/file/fuwifo.pdfIn PDF document text
    • https://pasifikendustriyel.com/userfiles/file/35362834488.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b5fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5FA 10532 bytes
SHA-256: bf7811514a82e0c93d1ac381a91553e6e24a3d544545787adacf93f1b1f82850
font_01_sfnt_off0000cdee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDEE 17948 bytes
SHA-256: 59db1ffe5933d75e539a7f2ddc6f334fdebb19d9b8446ba6c9a1afc718b709bf

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