Malicious PDF — malware analysis report

Static analysis result for SHA-256 95351cab589807c7…

MALICIOUS

PDF

91.3 KB Created: 2021-07-07 05:48:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 96fd8af01d5eb9495abddc091c25abb2 SHA-1: d25857748316fbf89684edc1b62dbcec48f9e1b5 SHA-256: 95351cab589807c759118fda7453cd50496b2aaec23054e3a73f5b82ace13ef6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF was flagged by multiple heuristics, including a ML classifier and ClamAV, indicating malicious content. It contains a link farm pointing to various domains, many of which are hosted on compromised CMS upload storage or appear to be disposable. The presence of embedded URLs and the nature of the heuristics suggest the document is designed to redirect users to malicious sites, likely for phishing or to download further payloads. No scripts were extracted, but the PDF structure and URL patterns are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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://kgmda.com/upload/files/vutudemivaxonulurito.pdf In PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/6e1ad288b27bcef29602f58e97922924/kajubosus.pdfIn PDF document text
    • https://coonvalleycc.com/userfiles/file/magozuteduwudod.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/8386307602.pdfIn PDF document text
    • http://parcfamilyreunion.com/clients/b/b3/b3ae52aef0329bb57e848b27182677c8/File/xifajomarubaduvezozuwe.pdfIn PDF document text
    • https://mariapolis.net/ckfinder/userfiles/files/mebamib.pdfIn PDF document text
    • https://dbjadow.pl/attachments/file/puzalovifemexiruxifux.pdfIn PDF document text
    • https://castilloexterior.org/ckfinder/userfiles/files/dotepimot.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/807b8b1ffacc39320fbf58bd5cf83248/47459736498.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/97273828d9c4be8f68186836cbc67901/19485113649.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ab76b876558---tebidiwatenopizi.pdfIn PDF document text
    • http://cnc-soustruzeni.cz/files/file/97312024089.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c220a8bd863---lasolamafefogumorilaxidi.pdfIn PDF document text
    • http://mictrogiang.com/userfiles/files/60930154256.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/fmr0qnpgnhv144atum5e2g1et5/47767149131.pdfIn PDF document text
    • https://freshchannels.com/home/sites/freshchannels/public_html/ckfinder/userfiles/files/3154511021.pdfIn PDF document text
    • http://alexanderkanevskyartgallery.com/clientMedia/file/namixuxa.pdfIn PDF document text
    • http://dakmet.pl/upload/jojivigunozamirofet.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/16098a205d6b76---tubibobowavutogeba.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/a87c9ce9797889220c28491af2df27f3/dudawefosarome.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/da3d0e1e224a5020de2f60179cbbbd3c/97385892440.pdfIn PDF document text
    • http://ebslang.net/_UploadFile/Images/file/69762156160.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160946b7bc3578---49496343347.pdfIn PDF document text
    • https://dietacud.eu/upload/file/dederasewimojojanusupal.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=business+model+canvas+to+fillPDF link annotation
    • https://lapdonline.org/file/25435747037.pdfIn PDF document text
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010208.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10208 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011a1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A1F 10756 bytes
SHA-256: f1295be3ec757aee01863fc2849919d52535c808d9487511cda14eceaee45197
font_02_sfnt_off000132e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132E7 17228 bytes
SHA-256: 16ac9fae486574973b7629b19b3722475a281670ff9331cff4543f35e37c0b57

Open this report in the interactive analyzer, or submit your own file for analysis.