Malicious PDF — malware analysis report

Static analysis result for SHA-256 580d178911a4b0a1…

MALICIOUS

PDF

91.9 KB Created: 2021-07-28 10:04:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ae4875574f73e0982bffc584731e17bf SHA-1: aeb39d3c5532c9d3fd12bcdcf6156849b996c0e4 SHA-256: 580d178911a4b0a191ac85210e23c1553bcf5ba3e48fbeece60a844528ee719b
196 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a high likelihood of malicious intent. The 'SE_BROWSER_INSTALL_LURE' heuristic suggests the document's purpose is to trick the user into installing a browser extension or update, a common social-engineering tactic. The presence of numerous links to compromised CMS upload storage and disposable hosting further supports a phishing or malware distribution scheme. No scripts were extracted, but the overall structure and heuristics point to a phishing or downloader attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://lncxjzxxw.com/upload_fck/file/2021-5-17/20210517135237770464.pdf In PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/444170bcef4583aa1ef9278884db20f6/47797024686.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a98a2e114---8046333401.pdfIn PDF document text
    • http://fotografieindex.nl/images/uploads/91219028583.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/mbdbqokd6iskfasge3n2ebl6h7/velozataxafemewukej.pdfIn PDF document text
    • http://topenglish.sk/app/webroot/gallery/files/29595012538.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0321a1460---30402013337.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/7a3299e37b867ebf75ff9cf4cb466adc/dararujekafitotanavo.pdfIn PDF document text
    • https://bednidhitraders.com/userfiles/file/12352593452.pdfIn PDF document text
    • http://vucert.vn/uploads/files/manepipolidivoxapotaponep.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/51b6316c7ebbf84a6b40311ddeed4d30/51882293545.pdfIn PDF document text
    • http://artospace.com/pics/file/lulujumoniwuvofeperemenam.pdfIn PDF document text
    • http://studiosimonepantaleo.it/userfiles/files/83547248287.pdfIn PDF document text
    • http://hkxhjfc.ltd/uploads/files/20210710115001.pdfIn PDF document text
    • http://aurora-c.jp/files/files/44904064970.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607252383c9f4---denawotivas.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/0augkm6pd96q0oojeln56h1em7/9418059524.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/hsse8aum61is6b17bcdnmaq3ro/vosajeje.pdfIn PDF document text
    • https://aravlicraft.com/cmsCart//upload/file/36554986377.pdfIn PDF document text
    • http://savvyais.com/userfiles/file/vububotokapimatutokemoje.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/50543624684.pdfIn PDF document text
    • http://jullien38.com/ressource/site-image/files/gedurexanize.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607de5c7be10e---66544790623.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=can+we+see+deleted+whatsapp+messagesPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E1 10644 bytes
SHA-256: f121893ae25cacfc269a8c5c300460e8aeaf8581ceeb5496ce457649c20df055
font_01_sfnt_off000118e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118E7 17744 bytes
SHA-256: 950fe2b87a4972fbe2ad5dc0891662c7cb41ff44437fb16f01aa1ae20fbf3cfc
font_02_sfnt_off000147cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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