Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab1830b05197f3a2…

MALICIOUS

PDF

53.9 KB Created: 2021-09-06 13:08:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7f167a73ca7fd6fdcc38a0d373d062fe SHA-1: 4baa0f91f61279d2c13bf35e74e58f370abb807a SHA-256: ab1830b05197f3a21ad1f98736109430b72df219d05b5310aa99711043511445
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF is identified as a phishing lure due to its image-only nature and embedded links, a common tactic to deceive users. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and numerous external links suggest it is designed to redirect users to compromised websites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8059

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 53 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://sce.tw/uploads/files/60f78403f3fcb.pdf In PDF document text
    • http://hpworld.hu/data/pic/Image/file/59802348222.pdfIn PDF document text
    • http://mkpstroitel.ru/upload/files/duxosud.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e13e6127ac999a96abacde802df35c81/xisawumepozufawexujuwe.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6qps8dh21v9ej42seogp1krpd5/86008138337.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/77531339519.pdfIn PDF document text
    • https://atraba-holding.com/userfiles/file/tamakijag.pdfIn PDF document text
    • http://manavpublicschool.org/manav/userfiles/file/57377327643.pdfIn PDF document text
    • https://forthepeoplegov.com/userfiles/file/kinububaxikawujujofagakan.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/fe637e59192c4a992ae1f2e89e3e2452/wurarowaku.pdfIn PDF document text
    • https://ijpdua.com/contents//files/jewenetudu.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5cda4926da---46825751486.pdfIn PDF document text
    • http://utpcomp.ru/uploads/files/linegilogakomagabi.pdfIn PDF document text
    • http://twtime.com/uploads/files/202109011911147333.pdfIn PDF document text
    • https://czus-lukasa.sk/userfiles/file/xifakawikexepij.pdfIn PDF document text
    • http://leeharringtonhomes.com/userfiles/file/28436134324.pdfIn PDF document text
    • http://matras-devison.ru/upload/file/99590319285.pdfIn PDF document text
    • http://aloeverajuice.cz/files/file/janemoga.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078115ac97db---wawumubik.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a84b19df069---gunugowanorawozumoguxalul.pdfIn PDF document text
    • https://ancoraeducacion.com/images/kometimadofur.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b99481e69ee---telomidikapow.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/rmh99o4oa9og0n5boa1somv57p/tuwolifijejadoxiwezilumiw.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/73083970937.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=superlative+and+comparative+pdf+exercisesPDF 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_off0000b32a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB32A 14408 bytes
SHA-256: 232dfda860e7829a26e907b494e60fb7305ea8fdb59f53ffc05659f7eeb8d37c

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