Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e9372729af3a2dc…

MALICIOUS

PDF

85.8 KB Created: 2021-07-31 01:04:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 268db3fb73e69e0609bb0f3ef362ffb9 SHA-1: 0326307332604f75c599f0842bf53b451e687fec SHA-256: 0e9372729af3a2dc8a89e2ca731fc7db48ef816b3219b82236eea0cd526fb6cf
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains numerous external URLs, many pointing to compromised WordPress sites, suggesting it functions as a link farm. The primary purpose appears to be directing users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://irlanc.ru/uplcv?utm_term=abcd+2+movie+all+songs+download+mp3
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/b158751c3384341c0f57c99a5939e378/63661615190.pdf
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606da0eb87bbb---towuv.pdf
    • https://geneticapanama.com/userfiles/file/54844655105.pdf
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9f7b4f82d---zarowesozitinifizolos.pdf
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/av55qjhrfinvq2l1nldug2trk7/52643091850.pdf
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/4932534324ca91e4fb2697d6267473b9/13876529443.pdf
    • http://humboldthighclassof79.com/clients/1/19/19f040aad945c40a0acbd79abd3dc6cb/File/baxarewekemasabanutikoxen.pdf
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf7e4281fc---kirotisebilan.pdf
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a83de7594a---68511007305.pdf
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/k12nflup2biiake2ldlshvk2h3/85724475328.pdf
    • http://remaining-mc.de/userfiles/file/vitet.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079f78604a07---funuwuvesudewibatural.pdf
    • http://artecgroupservices.com/imagenes/file/86489820673.pdf
    • http://musiclivemarsala.com/userfiles/files/29388280350.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/161046d5525fc4---88461075348.pdf
    • http://chinajnbt.com/images/upload/File/81543746407.pdf
    • http://internationalnetworksolutions.net/files/36266377046.pdf
    • http://boxshop.mn/userfiles/files/wudoninujotir.pdf
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/6adc43cf4a081855a34087639dbfa5d9/xawaxefopani.pdf
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1609f2700638d8---57972352204.pdf
    • http://termosystem.pl/userfiles/file/pidabekorenedo.pdf
    • http://hoanggiaphatland.com/uploads/image/files/bomiwomarizagiguvamapimu.pdf
    • http://baikalspring.ru/ckfinder/userfiles/files/jijolukixazojosetezedorid.pdf
    • http://axwelindia.com/uploads/62971721766.pdf
    • http://moreit.ch/productinfo/file/mugeziloduwixajo.pdf
    • 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_off0000e875.bin
287b825e0abd8448f1df18a3c93dcf102c23d5950043d49cbb2aaf409e5e89a3
pdf-font-stream PDF embedded font (sfnt) at offset 0xE875 17952 bytes
font_01_sfnt_off000117e0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x117E0 16792 bytes
font_02_sfnt_off00012ff7.bin
a2cc0751e11b5bf271db89b52d548fd748dcdff3c38737808ba5a1c45902726c
pdf-font-stream PDF embedded font (sfnt) at offset 0x12FF7 11224 bytes