Malicious PDF — malware analysis report

Static analysis result for SHA-256 e06a9f0449433ead…

MALICIOUS

PDF

74.5 KB Created: 2021-09-01 12:51:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a501e1b1957dde279260e6e3686dc576 SHA-1: 7d494ec453953cb2ee5327f0bc469aa75ed2ed87 SHA-256: e06a9f0449433eadef773fbb656c1a3f7fed138c120fd024a1fe2f7bf7c5060f
156 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 numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The primary function appears to be redirecting users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • 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
  • 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://dataprint.ie/uploads/file/25096590777.pdf
    • https://kaowei.tw/image/files/20210724_111951.pdf
    • https://irisapp.cn/uploadfiles/fckeditor/20210803/file/16279487081848.pdf
    • https://avenue102.com/uploads/file/nosojimafezinedejugefal.pdf
    • http://adance0112.com/upfile/editor/file/weboxeseraxike.pdf
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/hogjfdk62fpj7l4clrfvp17i42/golotaz.pdf
    • https://gitedu.in/ckfinder/userfiles/files/7933782155.pdf
    • https://foundryindia.org/userfiles/file/pakozojegaxu.pdf
    • http://showplus.ae/userfiles/files/ximufoja.pdf
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5014e1e70---mupivodexojepotulisiw.pdf
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160f434aaf136c---45421587689.pdf
    • https://ppuhperspektywa.pl/files/edytor/file/47494267938.pdf
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c284999fc7b---vasoxofune.pdf
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c6777577df6---lovapemezojerupodabenu.pdf
    • https://0900107678.com/upload/file/75828203816.pdf
    • http://epoxidice.ro/mm/file/libapefisemowagoderagiv.pdf
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607449224290f---57176328412.pdf
    • http://cbgnfinance.com/userfiles/file/puvomijus.pdf
    • http://www.peritaonline.es/ckfinder/userfiles/files/22693228343.pdf
    • http://stadion-zarya.ru/ckfinder/userfiles/files/77284236687.pdf
    • http://hoangminhphatkorea.com/webroot/img/files/69816155476.pdf
    • http://pahsclassof2005.com/clients/d/d6/d61c4c031b0f3af13d3e88110ef3a3e1/File/linedosojorexogirinemo.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=miniature+wire+haired+dachshund+life+expectancy
    • 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_off0000bffb.bin
4fb6b071c02fc8dde1c9c31ef8fc8be86b7c68efcbe77d2212ce7290887a0576
pdf-font-stream PDF embedded font (sfnt) at offset 0xBFFB 16192 bytes
font_01_sfnt_off0000e94f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE94F 16792 bytes
font_02_sfnt_off00010166.bin
eeafc115bd942218aba66b6cfe6903a2c5916a7e58aaf90aa09c90956bdb29a0
pdf-font-stream PDF embedded font (sfnt) at offset 0x10166 10992 bytes