Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd2d7cedeab7b48e…

MALICIOUS

PDF

83.9 KB Created: 2021-08-09 01:20:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1a4d6d01445d4161c65956d7f4c7f4ec SHA-1: c047cdfd5eea131f76b0e67b83f1b3b0603dcff2 SHA-256: cd2d7cedeab7b48e3ed46d6be6dafc29b51ba8e53c56cd173f5f3c06bb4858b7
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites and other disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://gocep.org/data/userfiles/files/rorivelorugixotowale.pdf In PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/a6d12b6b124215a23a6a3d358fe97ae4/44755074403.pdfIn PDF document text
    • https://magyar-logyogyasz.hu/fileok/file/2281748735.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/ff5c600793e2e0560ced46062da705b1/zuroserinu.pdfIn PDF document text
    • http://eva.am/files/bfb7dadc92e0bb63.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608453cc994e2---gukutugizi.pdfIn PDF document text
    • http://www.malagatour.es/ckfinder/userfiles/files/pebubujapuvuvefefejegales.pdfIn PDF document text
    • https://hnhaa.com/userfiles/tnejp//files/59293194260.pdfIn PDF document text
    • http://1959blackshirts.com/clients/866684/File/44075075498.pdfIn PDF document text
    • http://prestopc.it/upload/file/nagefo.pdfIn PDF document text
    • http://parkhighclassof60.com/clients/871169/File/serim.pdfIn PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/pelumowisosodagejaj.pdfIn PDF document text
    • https://samowar.me/upload/file/povirutodujasotaf.pdfIn PDF document text
    • https://asiahijau.com/contents//files/pomafizuxata.pdfIn PDF document text
    • http://washburnhs64.com/clients/f/f7/f75dc469904bb25755ea64d7551c4a95/File/86503992299.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/13o75kl5ffarnfb7ibtstih1mh/8046966971.pdfIn PDF document text
    • http://teenaramainc.org/clients/875997/File/6488800524.pdfIn PDF document text
    • http://vncdata.net/app/webroot/uploads/files/jefil.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d1f20b701c---rezolabazulamig.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608105ddaca52---namelisilezezarar.pdfIn PDF document text
    • http://slp70.com/clients/873855/File/15354452014.pdfIn PDF document text
    • http://studiogalata.it/userfiles/files/46448130941.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/160a00cf8c5119---gabewufulevufaguxiri.pdfIn PDF document text
    • http://www.euro-fly.eu/userfiles/files/97335852481.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/6p1abpe35aod4ogs1dp53elk60/26654628981.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=vampire+diaries+season+1+episode+6+gratuitPDF 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_off0000e3d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D5 17072 bytes
SHA-256: c2484e74e48856ec310b34f8f0cfa36478e88463a8feb5eb7243d1239bec26e2
font_01_sfnt_off000110c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110C6 10980 bytes
SHA-256: 576378d92fac3153f34ec46bcd3b6713d5be3a1562c6f84cc93b036b7420dba2
font_02_sfnt_off00012a1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A1F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1