Malicious PDF — malware analysis report

Static analysis result for SHA-256 cce09fc86d1062b2…

MALICIOUS

PDF

72.0 KB Created: 2021-08-21 03:09:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07
MD5: 8d4f6e32378286422d009ddd30285610 SHA-1: b2806956c856b76de4a71e716541221e34a664c7 SHA-256: cce09fc86d1062b2319a8313e8713a12aa7000857c934db1b42a683dbd9cd2b7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised WordPress uploads and other disposable hosting sites. These links likely lead to further malicious content or phishing pages, aiming to trick users into downloading malware or divulging sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6545

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://smidgel.ru/uplcv?utm_term=reparacion+de+computadoras+automotrices+avenida+r1 PDF link annotation
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/1f0ed88fefe86ae3a3075d11ef9fc5ed/leremijulevugiporagida.pdfIn PDF document text
    • http://leinerpakgelatine.com/survey/userfiles/files/tajulatakezimumatulipabaf.pdfIn PDF document text
    • https://la-klamm.org/userfiles/file/gijiwaperejidisukoku.pdfIn PDF document text
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/4c3045f89eb485e951fb1a1f45f15d72/36472818578.pdfIn PDF document text
    • https://nedimgame.com/calisma2/files/uploads/vekikojowaxazaza.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/7064130852.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160db40a7c8613---wisawosenuweporuruseloj.pdfIn PDF document text
    • http://fapannimario.it/userfiles/files/jipifigixuxunametibugume.pdfIn PDF document text
    • https://kottayammedicalcollege.org/CMS/ckfinder/userfiles/files/10436781981.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/9aa3c305c652cb5c4b2650e1647930ab/59886613919.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/rinsmot4uoj7nsnjn82kkbvfcp/busufilopobu.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b425bf89408---52788136127.pdfIn PDF document text
    • https://vsetinrally.cz/userfiles/file/jowowifadiwe.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f80fb55b911---bomibotutisunenesu.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/fdf3168e486514ca614989f8f65c8201/rijivorigujegomulorodu.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8b33251b3---berokamofilamokeli.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/9492a551e4467a585aec8baa696571c7/wipekanawapiluvexaxuke.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_off0000d1f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1F9 10892 bytes
SHA-256: 31fa36a3320786b08b1ad8550e18d3f4a66d3d3f0931b7cc88e759f805d1660e
font_01_sfnt_off0000eb47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB47 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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