Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae0f3e266ef7d1a1…

MALICIOUS

PDF

84.8 KB Created: 2021-08-26 14:49:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 03d4e1befbf0437e8ca357ba0d99544f SHA-1: 3df6d0d59cf4ec12792ae762689d5b3db3a0cc86 SHA-256: ae0f3e266ef7d1a1b771ab0fe9f830e77656e292fb800fcd776adb7bbd211f1b
164 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a high number of external links, many pointing to compromised or disposable domains, suggesting a link farm designed to redirect users to malicious content or downloads. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://chaodontuonglai.vn/uploads/ck_upload/files/98967640583.pdf
    • http://suachuaspa.com/upload/images-content/files/mekuxabejewexupedonone.pdf
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/8g2ua0cn6j2a8jttk64bvpjj02/50043036613.pdf
    • http://driver-jazda.pl/upload/file/59398509434.pdf
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/36171413406c62c8a28ac47001a77c1b/33955645756.pdf
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/9ebf7f962ec6807d587acca2d4b86bc4/75807008185.pdf
    • http://kapsalonindex.nl/images/uploads/48659078536.pdf
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609afc9635cbc---49676620550.pdf
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/0d4a5d263c535ea1ba5042978b851338/3962795962.pdf
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c95a9f40089---fogijadulalodideruko.pdf
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/113a5ce6a361eeada89dd66888adebeb/mamoturabupu.pdf
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/160afab666ed9d---58356583693.pdf
    • http://gistys.com/userfiles/file/rarofamexetitabasewo.pdf
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c17fd02e1e---jufozivulutaludebuwi.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4628af3535---42064346759.pdf
    • http://pcmcpropertyblog.com/wp-content/plugins/super-forms/uploads/php/files/887b397a5caa4a9728dc5dd099fda38b/68755622964.pdf
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/944e0794e00ca47f0fd47a07c6eaf2fc/40165209402.pdf
    • http://kaies.cn/upfiles/21073003124652217117uoo0.pdf
    • http://scheiden-maassluis.nl/uploads//file/76304350727.pdf
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/0521620a0f1b65e4ef809e7d40b5acfe/femaletonado.pdf
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/6e6bcab7b7124528c3dab03058ca0465/60845012232.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=dhoom+2+in+tamil+full+movie+download
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e923.bin
d912ca2ee9deaf99a1a5351b25287178c70960ea71a5dce36eeed0456f6c7351
pdf-font-stream PDF embedded font (sfnt) at offset 0xE923 16816 bytes
font_01_sfnt_off000114e9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x114E9 16792 bytes
font_02_sfnt_off00012d00.bin
965857ec608892f4e72cf724dc95120b2c84c570d7da54fcc79d1c37b6792021
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D00 10724 bytes