Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0a2197d3594e03b…

MALICIOUS

PDF

90.5 KB Created: 2021-07-02 09:57:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c5519e75057cf2b13c23a6de5c914188 SHA-1: fc3bd32c163779c074940c597d88ef6228e13ed4 SHA-256: a0a2197d3594e03b03f45c78e4ec12306a89f474f8015c7d22eab56c1bb6a023
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous URLs, many hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The file's structure and numerous external links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://jshtextile.com/UserFiles/file///kaguj.pdf
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b63c5636e22---28057458989.pdf
    • http://shinies.ru/img/lib/file/vasazujivazijejuv.pdf
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160925fa1dfd80---dovenoki.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/v6ofrf4qu6tn7and342hda2hov/86665768829.pdf
    • https://curryleafharleysvillepa.com/hang/userfiles/files/towewekivazovoziroxexife.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/97j0v0g77d59s08b9he99up3u6/jabigogipumiwaluwig.pdf
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160704ee421b47---90340889278.pdf
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/16083273967f88---jegukuvidapawefekexizev.pdf
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/f3b337ea2e9c6d833516c964e23bad92/liluwijuforotesedej.pdf
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/mfv80jfk1f491h039715jto036/72734256176.pdf
    • http://ks-puyuma.com/CKEdit/upload/files/64803067640.pdf
    • http://yournamebadges.com/withyourdog/cms_uploads/file/gixusubitumuwajigufufa.pdf
    • http://greenbrier101.com/userimages/fotededabitopojimidewulib.pdf
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/93fc03ab78a68be5c86019dfa3d00918/87396609784.pdf
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6affaf926---23741587014.pdf
    • https://celebicatering.com/upload/ckfinder/files/modeziwegoz.pdf
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608573948974c---xegafitupu.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16083596153113---zuduw.pdf
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/7dbf4c5cd2c4a80717dd69b18ff9929a/wakejupiwafij.pdf
    • http://tubietelbar.hu/uploadfile/31553115417.pdf
    • https://sieuviet.net/webroot/img/files/jovijixuzaxe.pdf
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/160756fae17072---48335305913.pdf
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b6d4aab3eb2---42528352716.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=boys+above+flowers
    • 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_off000100c2.bin
2ce7695b67a5a8f3ebe02da951515eb99456ca05b3a059d6b3ba70fdef14c77e
pdf-font-stream PDF embedded font (sfnt) at offset 0x100C2 16952 bytes
font_01_sfnt_off00012cf6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12CF6 16792 bytes
font_02_sfnt_off0001450d.bin
780dc49c05a4ea2232a30faddabc3728f63e9fec649211758b1601409b282806
pdf-font-stream PDF embedded font (sfnt) at offset 0x1450D 10372 bytes