Malicious PDF — malware analysis report

Static analysis result for SHA-256 01477c19147696a4…

MALICIOUS

PDF

74.8 KB Created: 2021-09-02 08:48:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: b66156fba4404b38586ba780902e1dc9 SHA-1: eab453d31bbf389915774054108f755044d09aa4 SHA-256: 01477c19147696a4f23be7c87bac46071864d1bbf191b6c7f100f353be5e216a
154 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress upload directories, suggesting a phishing or malware distribution scheme. The ClamAV detection and ML classifier further indicate malicious intent. The sample acts as a link farm, directing users to potentially malicious content hosted on various domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8144

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://synerhu.ru/uplcv?utm_term=everyone+got+so+much+to+say PDF link annotation
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3d694d44d---womeze.pdfIn PDF document text
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/50118026168.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16110919199b6e---talewemebis.pdfIn PDF document text
    • http://beming.com/ressource/site-image/files/42257448404.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2702f561fe---tekazulawefofuwon.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0857f335b---vomabulefusavev.pdfIn PDF document text
    • http://handsonmontessoripk.com/userfiles/files/37808260110.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/a256b2c5f5a919692a30b7360a3e492c/futiwutufibifiwa.pdfIn PDF document text
    • http://canadianrockies.ca/files/file/nagorowawif.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/jiha0gbjvhslfitr1q2jhk7sbp/lopidotodavusuzut.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8e57e1f87a---kukab.pdfIn PDF document text
    • http://asfalon.com/__files/file/tanaji.pdfIn PDF document text
    • http://webinaris.eu/ckfinder/userfiles/publics/files/xopow.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/db9206af355bd64e1030d5ca777f90eb/fapagozusu.pdfIn PDF document text
    • https://tch.lu/files/files/13892950132.pdfIn PDF document text
    • https://tvsporedi.si/vsebina/laluvafuwawanufokuz.pdfIn PDF document text
    • https://motacademy.it/file/87889663016.pdfIn PDF document text
    • https://yorapp.it/file/80881716613.pdfIn PDF document text
    • https://aksukartela.com/images_upload/files/84781126483.pdfIn PDF document text
    • https://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/8cutlll19g767bpsvqt7sip3qd/petuwoke.pdfIn PDF document text
    • https://www.tri-or.fr/tri-or/ckfinder/userfilesfiles/95165564092.pdfIn PDF document text
    • https://transmar.biz/ckfinder/userfiles/files/83891210390.pdfIn PDF document text
    • http://njf724.com/basefile/janatalnajafcom/files/13163423530.pdfIn PDF document text
    • http://opusbiz.kr/data/editor/file/153082291560ff03666aab6.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_off0000e253.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE253 10800 bytes
SHA-256: 51fd1bc62dc3a55e8804b69b70919ccf568c490971cd5008133401fc31c3251e
font_01_sfnt_off0000fb1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB1A 19372 bytes
SHA-256: aebcb432c186ebb446c4a93a1796831cfff5f9a28150e8082c32f782d0534494

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