Malicious PDF — malware analysis report

Static analysis result for SHA-256 a97412d5687ee10a…

MALICIOUS

PDF

64.0 KB Created: 2021-10-01 15:16:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 1f2ab43d783a599ced6785c0e65c58e9 SHA-1: 12a3497b37bb5170489152d623883f7b002c3b83 SHA-256: a97412d5687ee10aa934b0bb3507376299e96c4e10453c0659cf8e8ab052025b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier flagging strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5541

Heuristics 5

  • 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
  • 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://irlanc.ru/uplcv?utm_term=funny+story+opening+lines PDF link annotation
    • http://galluccifaibano.it/userfiles/file/11019795056.pdfIn PDF document text
    • https://ptogel2.com/contents/files/wasajujukonuzedukufilor.pdfIn PDF document text
    • https://borgopitti.it/userfiles/file/93824978689.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613341b5390c8---4135042954.pdfIn PDF document text
    • https://vietrocknet.org/app/webroot/img/files/28939637415.pdfIn PDF document text
    • https://pima-alarms.rs/slicice/file/gofuzebuburivesi.pdfIn PDF document text
    • https://basisangka.com/contents/files/75453961610.pdfIn PDF document text
    • https://letajicikoberce.cz/userfiles/file/39929381104.pdfIn PDF document text
    • http://booklandbooks.com/userfiles/file/64524741980.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/16133fff3bfad5---42166865789.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/38052715078.pdfIn PDF document text
    • http://hiro-seiko.com/upload/files/76881723392.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613a92aa8ba80---sugexewixerulur.pdfIn PDF document text
    • http://xn--80aaaaaikdebj9ccf1ayja1b5a3q.xn--p1ai/ckfinder/userfiles/files/67580624732.pdfIn PDF document text
    • https://kaptenhoki.org/contents/files/fisafuxugadidebokugalije.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16142892b8b615---sixibokukekat.pdfIn PDF document text
    • http://photou.cc/ckfinder/userfiles/files/dibaxulebagemes.pdfIn PDF document text
    • http://www.anaja-inter.org/public/file/71369359362.pdfIn PDF document text
    • http://smart.sut.ac.th/tsme/src/lib/ckfinder/userfiles/files/zaxawifetekibafidu.pdfIn PDF document text
    • http://c2ctrading.org/cms_upload/files/2247408463.pdfIn PDF document text
    • http://thucancakoihikari.com/luutru/files/wuzafimedaf.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/joluvono.pdfIn PDF document text
    • http://kommunikator.nu/demo/userfiles/file///lomozabidilomovitomexup.pdfIn PDF document text
    • http://runbo.net/upfiles/files/1632663539233.pdfIn PDF document text
    • http://giadinhmedia.com/uploads/files/65928936421.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_off0000b4d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4D2 16884 bytes
SHA-256: 3ff6babd7d3093e3380237318c08c61ee793354cc319d0e1c71aee8a379f7f0c
font_01_sfnt_off0000e048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE048 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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