Malicious PDF — malware analysis report

Static analysis result for SHA-256 732eab80a94df938…

MALICIOUS

PDF

87.4 KB Created: 2021-06-25 22:32:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 05cfad07be8b120027fcdac89fb18bb1 SHA-1: 8ccc5ffab04be7a422f98a607a257489bfe28caa SHA-256: 732eab80a94df938a4104250a5dc7dd49d92769c2e5827b93c64d5d2ff71ff9e
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to compromised WordPress upload directories. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. The document's structure as a link farm suggests it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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
  • 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://bright-mineral.com/uploadfile/file/2021052720561741.pdf
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/6fc9f4864698a65c2fbddcdc5b8976ea/roduwilurituru.pdf
    • https://sunarchegypt.com/userfiles/file/74804451356.pdf
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/j399f83pagrnnl8i8oescufu6e/gerasu.pdf
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b0aed92c8fe---piwusisevegewovizeka.pdf
    • http://hillcresthigh1971.com/clients/9/9f/9fbf9047a6869172a982db6f42f05a9a/File/popozexoritijajakirus.pdf
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/ad154220dad965e8f6eb8c819699edf6/nunisodawapa.pdf
    • http://ahrestygz.com/userfiles/files/20210617_202512.pdf
    • https://alshamiltrading.com/alshamilfiles/file/nobatejutu.pdf
    • http://qhzs88.com/admin/fckeditor_upfiles/file/2021061422435480554.pdf
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/5qr7v0ig973ilpm3s3fp515j5v/lulepa.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/be153943d93997a9f4237fa20e4c7d12/85962071848.pdf
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/16098f8ab5a65a---7006232338.pdf
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/192b6e63161a5140468664a14ace1810/vafutefazuzadejag.pdf
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bc8e1fcc7e4---mubofegewunamofalow.pdf
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/4db245507e616b334880cea22cacf6f6/10918954063.pdf
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a0b1804b3c5---53651016422.pdf
    • http://thelonerangerfanclub.com/ckfinder/userfiles/files/73812819819.pdf
    • http://stalmost.pl/userfiles/file/jiwezimopikaxajus.pdf
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/9624f4cdcd5c79550e0405424c204157/kofodu.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/42350beccd28453bf3893691c52a0716/wusupajotoka.pdf
    • http://dade666.com/userfiles/202106file/2021062514240370554.pdf
    • http://cravaluos.com/ckfinder/userfiles/files/fawaxodevizukidatureral.pdf
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160909969f257f---sumenawuresir.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=html+and+css+design+and+build+websites+book+pdf
    • 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_off0000e820.bin
fa12f71dc6b3a00f63abc5ffd5ab10047f91061177129a334620db73265ec1db
pdf-font-stream PDF embedded font (sfnt) at offset 0xE820 20120 bytes
font_01_sfnt_off00011be8.bin
7092696a2272f6fd61adad47cbd12f886e838017a551f5d23878fc340fc16b57
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE8 11272 bytes
font_02_sfnt_off000135f3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x135F3 16792 bytes