Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8eb93aece9af1b0…

MALICIOUS

PDF

70.3 KB Created: 2021-09-04 14:23:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d2f18afa773b08bcbb28738ecbd53800 SHA-1: 8dcf225299b2897ee2d5f4ebd783bdc75e9ce322 SHA-256: d8eb93aece9af1b0a0db54663c0a5111318d5107ebf1d04acab1f439e46685d3
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs that point to a link farm hosted on compromised WordPress sites and disposable domains. These links are likely intended to redirect users to phishing pages or download further malicious content. ClamAV detection further supports the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4539

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://pistant.ru/uplcv?utm_term=screw+pump+working+pdf PDF link annotation
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/24b9a809a0de908e0cae38241415080d/puzuxebajabotexerad.pdfIn PDF document text
    • https://nanyangtextile.com/userfiles/file/vovulekewubapubad.pdfIn PDF document text
    • https://www.institutvzdelavani.cz/files/lesexaf.pdfIn PDF document text
    • http://remaining-mc.de/userfiles/file/90078706487.pdfIn PDF document text
    • http://modero.vn/upload/files/89433719416.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/ufc07fqiuq11fnp51h7vs0kulr/birojatesexijitazijigi.pdfIn PDF document text
    • http://hytechplus.com/userfiles/file/balegozefigababin.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/a6c910087960d3665359bba2c636c3fd/xetamepigidasafutudaxare.pdfIn PDF document text
    • http://temple.mo/userfiles/file/rejalawiwefapalemilir.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b88c97bd0e5---16944446019.pdfIn PDF document text
    • http://wsm.hk/images/uploadfiles/file/xedukuzaf.pdfIn PDF document text
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070abaf084c2---23841756753.pdfIn PDF document text
    • http://dptour.net/bot/ckfinder/uf/files/xorowikagol.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/esefuduside.pdfIn PDF document text
    • https://firesystem.ro/imagini_ws/76325481148.pdfIn PDF document text
    • http://cropscipublisher.com/files/upfiles/file/30223832183.pdfIn PDF document text
    • https://knurussian.kr/DATA/upload/files/202107241306513780.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16070f06ad3044---vajaxejur.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d901f7a379---redipuwojukisute.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/42c18f0d700d56c3ef445ad75e7c6d3d/vasabonok.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/046edf265664289136bcd903fe10ea61/66138138540.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/7b706033d75b9ed2233b440e39e4ed88/lapaketebiw.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d069e4cc6a---dufuji.pdfIn PDF document text
    • http://haiphongcontest.com/images/files/zafakogigaduwaja.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_off0000cf89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF89 18920 bytes
SHA-256: ac8f8af74c038c853f113933a330c9c45a265ebc4d995fb8924d3fb9d0ceb07d
font_01_sfnt_off0000ffd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD3 10840 bytes
SHA-256: 016048eb9f2040da9c2ea50e58499dda619eb9d7ac960f95574c17984f04e9da

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