Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9e9f2c003f543a2…

MALICIOUS

PDF

79.8 KB Created: 2021-09-04 21:26:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 4f478a2815056049e41b62428aeb8b42 SHA-1: 0de35dfed40a7e62945f258d97c2d69e1c02d244 SHA-256: a9e9f2c003f543a2ae32c303454fe7dfa82605e98e324527d0b5efcd68cda033
154 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised or disposable hosting sites. The presence of numerous embedded URLs, many pointing to potentially malicious content, strongly suggests an intent to redirect users to phishing or malware-hosting pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6813

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://indirimlipin.com/calisma2/files/uploads/2254541473.pdf In PDF document text
    • https://sheenabusesandcoaches.com/userfiles/file/68535556748.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/121c6337ecd808222d76a1ea75d11b54/7119703043.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/xopelilaxizufekotum.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d8ac28e192a---timifaforefud.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/bubegiwarubula.pdfIn PDF document text
    • http://d4sontario.com/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/3997795819.pdfIn PDF document text
    • http://amon-syotengai.com/userfiles/file/20186674576.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/nojebanosukaw.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1f80527ac2---mugovujimovaroxuronivewig.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/161075845645f4---jobizonizupuk.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608b2e2a3568d---35923032644.pdfIn PDF document text
    • https://vieclambaohiem24h.com/upload/files/52495790509.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5df8e8c314---zevijuwuzorazunawu.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/s26mnhnlajf1bfoc4k6okqsd75/60980262395.pdfIn PDF document text
    • https://perfecthospitals.org/ckfinder/userfiles/files/50349255038.pdfIn PDF document text
    • http://tramtronbetong.com/uploads/userfiles/file/53252682852.pdfIn PDF document text
    • http://szkolka-wiercioch.pl/files/file/kabigulisewotekakaduz.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4700fd9c8e---tamidufoxuke.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/042c3f2c0672415df35f9b00406ac8cc/paloramuratojubit.pdfIn PDF document text
    • http://v-lukomorie.com/uploader/files/dikokux.pdfIn PDF document text
    • http://myjobcareer.net/userfiles/file/2021071516010273499.pdfIn PDF document text
    • https://dailyhondaotomientay.com/upload/files/70942334124.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/df3d60530be3234cd4cb06414363ae78/95766681268.pdfIn PDF document text
    • http://itkaufmann.com/images/fckimages/file/todesuninefej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=gigabyte+h310m+s2p+manualPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001107c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1107C 20188 bytes
SHA-256: dbe0664405841f150cbaa77ed7a0313e2b343c317ba257dbce72f4803c09256d

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