Malicious PDF — malware analysis report

Static analysis result for SHA-256 960b0d522a07445e…

MALICIOUS

PDF

80.2 KB Created: 2021-09-12 11:58:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e0a32cb8d09589cc2f5bac88dd113725 SHA-1: 4e16d203c28a993fa6fddf2206ac6e545f6eec3b SHA-256: 960b0d522a07445ecd559f3436a0a13c5a927ebad37e1adc32e4f2e67b2279e2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or malware distribution lure. It contains a link farm with numerous URLs hosted on various domains, many of which are associated with compromised CMS uploads or disposable hosting, suggesting an attempt to redirect users to malicious content. No scripts were extracted, but the presence of multiple external URIs and the overall structure indicate a likely attempt to deliver a secondary payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://crystal-lamp.ru/uploads/files/jijuxusegurudop.pdf
    • http://aihyang.com/userfiles/file/34066351305.pdf
    • http://agriturismocorteerbatici.it/userfiles/files/41042247714.pdf
    • https://snqrsl.quebec/upload/editor/file/wuzifejisebawusuj.pdf
    • https://bepxuyenviet.com/upload/files/japagorigevilifozap.pdf
    • https://bozoklar.org/ckfinder/userfiles/files/jijapopopiji.pdf
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/c1db9407215255ebf71ed5417c63b167/voxetatadukogepim.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/2e7b5607da0c4fe04a60c442160dadc3/tojubukakisimodomije.pdf
    • https://goldfieldssanddrags.com.au/ckfinder/userfiles/files/nipomelebi.pdf
    • https://bepxuyenviet.com/upload/files/75893184523.pdf
    • http://obrienbuilders.com/userfiles/file/kuwonorezuvaxazuvefurami.pdf
    • https://unique-u.biz/images/uploads/file/15715563114.pdf
    • http://shinies.ru/img/lib/file/18740310369.pdf
    • http://veoguidecostarica.com/ci/userfiles/files/99671452411.pdf
    • http://alpes-maritimes.proximeo.com/ckfinder/userfiles/files/56294762690.pdf
    • http://www.museopizarra.com/ckfinder/userfiles/files/81583239205.pdf
    • http://pilot-market.ru/new/files/file/luwipala.pdf
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/e3a0bab0d3075aa3756e5a292e5ea5e3/54826420384.pdf
    • http://www.pattyn360.com/upload/forum/files/70455590193.pdf
    • https://satbietthu.com/luutru/files/ruvowowazovajum.pdf
    • https://stef-nancy.fr/upload/document/39819791763.pdf
    • https://angelsolutions.ro/ckeditor/ckfinder/userfiles/files/judover.pdf
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613059df16f68---saduvubemafowuzana.pdf
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/7b1daef455b102b78b9011b47e45e1b5/nolivuviginopekajuvimeba.pdf
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613522d2ecf1e---37091928459.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/16135ca7ff19db---11821699036.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=kite+shape+geometry
    • 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_off0000d490.bin
f6b3db97f008885b6a1d3ff1dd6371efd1e34e88431489709501f2e34d8ca6d6
pdf-font-stream PDF embedded font (sfnt) at offset 0xD490 17764 bytes
font_01_sfnt_off0001026f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1026F 16792 bytes
font_02_sfnt_off00011a86.bin
c8e7ef87263be005f8234c046c2edcc6f393d40905d0637ed4ee9c851e518369
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A86 10652 bytes