Malicious PDF — malware analysis report

Static analysis result for SHA-256 783b0cba476ac8ef…

MALICIOUS

PDF

86.0 KB Created: 2021-06-30 22:48:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3cd5e54692c3705bfb73320b2d14846c SHA-1: b2441be642d2148573aee221004e364df3812ce9 SHA-256: 783b0cba476ac8ef0ae6537da5baa626887bba18bc8eb78daf0ff8f0e91f5ae2
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to websites hosted on compromised CMS platforms, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The primary function appears to be directing users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/ec8e7f67d58c805a7ab5996c5878a328/numaxirunoropi.pdf
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/72d1907a0997752a902282004f239b55/filom.pdf
    • http://palami.by/images/file/tesurikaxokelamil.pdf
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cd5d3afdc9---36393937391.pdf
    • http://954move.com/clients/4890/File/musaxekuzimovunigafitazan.pdf
    • https://protradingindia.net/userfiles/file/togekiwotafituxuvutesu.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088174c3c51b---35806157163.pdf
    • http://giant-nano.com/app/webroot/userfiles/files/budedizekaba.pdf
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/16078cfb870019---gugamuluvosojemedim.pdf
    • https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa015d317b---pezuxitabegiwonodinoxe.pdf
    • http://ashioke.com/images/library/File/fedelozenolazateke.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/2dfed72998966590a2e67aec82866e47/felewobematuwupus.pdf
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/43n2gjbokjknqfh3jujco79g37/79588218399.pdf
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a69a612eb2e---fizofikil.pdf
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/44dc11b3186d41e4e6b0d62d6e09020e/sijamowo.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/8f0gbpato551ug5eh581i2k8ae/45135057526.pdf
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa2f3575b8---bevinupifosufoniwomemur.pdf
    • http://matstravel.ru/userfiles/file/punotejozizopamuxubitusol.pdf
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073745e9eef8---misofanowefivebedesoletom.pdf
    • https://b2cexpressdemo.com/userfiles/file/vonuwuliki.pdf
    • https://asset-books.com/userfiles/file/lofaligeditukafujimuwej.pdf
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f465d30daf---64013370740.pdf
    • http://designpavelzapletal.cz/files/file/jonatekudunozazatet.pdf
    • http://www.deopendeur.org/imgUser/file/19275036056.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=honeywell+thermostat+chronotherm+iii+manual
    • 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_off0000eaa8.bin
b8540731b496e24c68e3ea4d47e21d0a405fcb6c81687ff380491350bb0e3d45
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA8 10788 bytes
font_01_sfnt_off00010362.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10362 16792 bytes
font_02_sfnt_off00011b74.bin
b3b08743877c2b2dbba53f3168c38e7f25dde55490a5c9fc9b2c526881543457
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B74 17364 bytes