Malicious PDF — malware analysis report

Static analysis result for SHA-256 00a43e4185aa018c…

MALICIOUS

PDF

79.1 KB Created: 2021-09-03 09:47:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d810371dfe5b92523b1d6a84431d2650 SHA-1: 792457bdf9a7e91914bfd623f7abf3a5696f99c4 SHA-256: 00a43e4185aa018c2744121d4adf06ffae9bb34bbde84395946d94c2981f63f6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm or redirection scheme. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5648

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://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a61bc47ba62---88680055921.pdf
    • http://kemenyseprosiklos.hu/upload/file/furibagag.pdf
    • https://juhaszautovill.hu/userfiles/file/20024380260.pdf
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c525894897e---toxivularezebobebut.pdf
    • http://ps-chiptuning.hu/userfiles/files/75197593881.pdf
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/6gbujv3q0gdn6u87mtbhvh4fu0/roligevivoxujulawev.pdf
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4a8a7684cd---34152396336.pdf
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a934c59601f---dinejewefemaniresuni.pdf
    • http://puntolinea.org/userfiles/files/65966378909.pdf
    • http://beiwendq.com/userfiles/file/gixafixavuto.pdf
    • http://amtutoring.com/clients/865321/File/lokonasutivoloxebulir.pdf
    • https://nothingbutsafetyglasses.com/userfiles/file/vejav.pdf
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5429878297---laxazuzemakawi.pdf
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160fd48329aa11---wonogurazugajekezarika.pdf
    • http://stacjaregeneracja.pl/userfiles/file/limosebenifofewafojajizib.pdf
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/kfvf4219e5dmtilstaaoar7iv2/31502619899.pdf
    • http://thestarbusan.net/FileData/ckfinder/files/20210714_3E5C993F2B854F04.pdf
    • https://imagebuzz.net/ckfinder/userfiles/files/detusimaniv.pdf
    • http://project-st.ru/userfiles/file/47879247491.pdf
    • http://www.jucadent.es/ckfinder/userfiles/files/32274602570.pdf
    • https://korovin.org/site/img_ufiles/patosenozo.pdf
    • http://lltsg.com/uploadfile/file///2021062403094261.pdf
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/4fee49cf886bf3ad8855260b8f42edca/lakunezolurepusoziranif.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=forever+living+aloe+first+pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000110bf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110BF 16792 bytes

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