Malicious PDF — malware analysis report

Static analysis result for SHA-256 227386fbe4fc0405…

MALICIOUS

PDF

87.6 KB Created: 2021-09-04 14:47:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2c6dacdbccd0cd6f2983ac82448fe0f8 SHA-1: 6315c1537383e7151bbb36062929b76d86c9100a SHA-256: 227386fbe4fc040591934fbd721e7bf458c744329ed1521cedd9fcb38c7576db
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous URLs pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to lure users to malicious sites.

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 https://archism.ru/uplcv?utm_term=polytechnic+entrance+syllabus+2018+pdf PDF link annotation
    • https://villatoscana-pi.it/userfiles/file/sobemesigeresed.pdfIn PDF document text
    • https://etadelloro.it/images/file/dilinuvinovawolorew.pdfIn PDF document text
    • https://boucherienabli.com/uploads/FCK_files/file/kitelivekajoji.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609aa271e8706---soliwuzinepijosu.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9b360378f---7023635833.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/g3ntes77cvj3ugjr061qnehhc1/35596182025.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/97516719739.pdfIn PDF document text
    • https://searchlink.org/userfiles//file/vulasesubiserepijezeto.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/42a97fd086521172e03c944d79c0d35d/kepapize.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/161328faa65c61---rowatopatuwijapixaf.pdfIn PDF document text
    • http://omegapizza.net/uploads/files/biwabosagejobelosuwumaje.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/02ff8c9c2e00473905d632734912f8df/bopulobizapisij.pdfIn PDF document text
    • https://devismesport.fr/userfiles/file/repivodefawizejujom.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a9dacd50077---telelofa.pdfIn PDF document text
    • http://cupta.org/userfiles/files/20210721070057.pdfIn PDF document text
    • http://digifast.cz/userfiles/52512124045.pdfIn PDF document text
    • http://dexgerm.com/data/file/userfiles/files/61073947738.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607d191fbb93a---funakaliwa.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/7nlldcm50gmklvrt26nmg5hcu5/wovaselesubepetiril.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608893a90b892---36855372427.pdfIn PDF document text
    • http://cnzhongkui.com/fckeditor/editor/filemanager/connectors/php/uploads/file/300131099705.pdfIn PDF document text
    • https://foodphotoshop.com/userfiles/files/zotawevajilafiboji.pdfIn PDF document text
    • http://daehwa.info/uploaded/file/ridorumisup.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16115e1336ae29---zexaramukamigipepivav.pdfIn PDF document text
    • http://www.sname.org.tw/sname/ckfinder/userfiles/files/kufaxatezo.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_off0000ef25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF25 11576 bytes
SHA-256: 69ca1447b215619ebb3d4ad09d3ae3fc091ebd86af82a5194cef32c7e201a005
font_01_sfnt_off00010a78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A78 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001228a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1228A 17848 bytes
SHA-256: fb54b8cd05309b09368737421ea8fee525421d5b3181210dc67ac00f02a0c5e5

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