Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f2923a333bbb060…

MALICIOUS

PDF

84.6 KB Created: 2021-08-15 09:56:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: d2e870144a6ca6c64b3360ff61a2d9d8 SHA-1: 4cf7bd3cead25579b8cfe3d3c0e3e7deb7dc3086 SHA-256: 7f2923a333bbb0603bd00f3fcf6d89bd8f6ac95f971c2df48e33a410008f4f95
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV also detecting it as Pdf.Phishing.Trojan. The embedded URLs point to compromised WordPress upload directories and other suspicious domains, indicating a likely phishing or malware distribution scheme. The file's structure and numerous external links suggest it acts as a lure to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160bdc0d3c4e1d---89567698898.pdf In PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202104290223363723.pdfIn PDF document text
    • https://vntdc.com/upload/fck/file/tuwujezulinatijot.pdfIn PDF document text
    • http://zoldjogsi.hu/uploads/files/futojegibokorumawu.pdfIn PDF document text
    • https://vieclamhanoi247.com/upload/files/85635338873.pdfIn PDF document text
    • http://china-miyaco.com/img/file/202172204956.pdfIn PDF document text
    • http://mabifitness.it/userfiles/files/bigodutaberoremopefodej.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/xiwozevuvuvijoriwaxikuzox.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/e363ab77e25cb4b626de52bbe073a4e9/pomaw.pdfIn PDF document text
    • http://morard-mcf.fr/data/Files/zogamobetufulikadaxem.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/p4k6qhkhnj2ioebvgtt37r3li5/wusogagovekowenig.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/wobuk.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/75a2eabc14c888bca338007f67f5df2d/lonevuradesi.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a59938936c---dorabavajulosutiz.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160765d06408a4---baxepijuzeliwe.pdfIn PDF document text
    • https://educationindiajournal.org/ckfinder/userfiles/files/xibawarerovud.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/vuzemidedorodifelolulesi.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16087d9dce3ff4---mexozojuvoge.pdfIn PDF document text
    • http://rilta.net/userfiles/files/8480399573.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093c36616d96---sozifoxorak.pdfIn PDF document text
    • http://www.asslar.de/downloads/9506865266.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/nkdhoah42hitjsqrbmj4k5jf25/busujilidinen.pdfIn PDF document text
    • http://rgjbreunion.com/clients/6/69/6950e03db8b1ea894755b369f0a03c31/File/33426811119.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=ellas+llegan+primero+pdf+google+drivePDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e51a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE51A 10792 bytes
SHA-256: 6e3ae02a9a20864421ffbef449582bae3e6976b5d0ab1d9e5fccdf6481765a73
font_01_sfnt_off0000fdad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAD 17128 bytes
SHA-256: e1ef3b395441ed90ffb87ccb5c922f53a1c826e62dec758fa4dd72b2514a920a
font_02_sfnt_off00012a0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A0B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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