Malicious PDF — malware analysis report

Static analysis result for SHA-256 284551d60108c316…

MALICIOUS

PDF

83.4 KB Created: 2021-09-08 04:52:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f5bd4c66a268d781685b6b2e9149c269 SHA-1: 7dd593e1336a46d90b4d64cd632b32725ee44caa SHA-256: 284551d60108c3169534b9496053e64ced485335033dc53d6d7663fde25f77cd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to websites hosted on compromised CMS platforms or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier further support its malicious nature. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6964

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 http://automotiveenergy.cz/userfiles/file/jizidurudevozipifoxakuse.pdf In PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/dovugelefufuvodidononu.pdfIn PDF document text
    • http://harryreichert.de/uploaded_pics/News/file/fedinixorixufumotamif.pdfIn PDF document text
    • http://tuzoltosagmihald.hu/userfiles/file/39869809769.pdfIn PDF document text
    • http://hiro-seiko.com/upload/files/3593188416.pdfIn PDF document text
    • http://bowenlawmt.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jatesejojid.pdfIn PDF document text
    • http://whalesart.com/uploadfile/file///2021060104544753.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16118343c0bafa---53704790908.pdfIn PDF document text
    • http://toonesk.com/upload/vowukotinawobupote.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/kn9jqspu2mcmpeoqna6jghq0e7/temazaralereditinuzafu.pdfIn PDF document text
    • https://khotelmarket.com/FileData/ckfinder/files/20210625_B8251318B1A82A7F.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e49a3053b2---36259747010.pdfIn PDF document text
    • http://bociany.sk/media/file/tumepopipinafezeduvemiru.pdfIn PDF document text
    • http://thessalonikiflights.com/files/files/58670646252.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160928ec4e673d---80408042059.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/35290620712.pdfIn PDF document text
    • http://larrysiegellaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/70644792984.pdfIn PDF document text
    • https://office-agglo-larochelle.fr/userfiles/file/gazemedemunewowezisiwun.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/jebujejosijatanojokukurun.pdfIn PDF document text
    • http://frutapacargentina.com/ckfinder/userfiles/files/18752969698.pdfIn PDF document text
    • https://study-abroad-travel.com/ckfinder/userfiles/file/mupiwonapokusunenel.pdfIn PDF document text
    • http://pomodorolennep.de/gfx/userfiles/files/305534474.pdfIn PDF document text
    • http://whs1963.com/clients/7/75/758a827d59fb1c2827eec60421ffdc22/File/13483701659.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/33016dfa2177159f1d755a359c23612b/nedabodagibajuki.pdfIn PDF document text
    • http://judge1960reunion.com/clients/873273/File/pakutenotasobulejum.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=histopathological+examination+pdfPDF link annotation
    • 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_off0000ecc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000104d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D4 19348 bytes
SHA-256: 0deea8f27ad8f710d5e9312baa87fc48c4387338d3a4d547f90f2e3ff7404a31
font_02_sfnt_off00013788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13788 11060 bytes
SHA-256: b6b806fc117f41e767d206d9cc599516bd1fe8251e6cf6d94a35270d027ad7e1