Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e28cf2b0d841e10…

MALICIOUS

PDF

86.7 KB Created: 2021-07-14 03:16:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a29f81613dd69485a83eab02aa45eda6 SHA-1: dedd0b3d13b0e3b118d08d28a509bdd8fb898364 SHA-256: 9e28cf2b0d841e10d2d93b73001861ba091c0c09cf3f1289f0e9677bb09f2671
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://ketchas.ru/uplcv?utm_term=pasword+the+warior+ps+2
    • https://ehlibeytalimleri.com/resimler/files/99587541008.pdf
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160ab90533ab57---46968232115.pdf
    • http://innova-perila.ru/upload/files/xuvenowutosuwager.pdf
    • https://shopabrang.com/images/files/78361235171.pdf
    • https://costabravas.com/uploads/localidades/files/jometebabugo.pdf
    • http://abwgulfport.com/uploads/files/95273329849.pdf
    • http://bajcsidavidfoto.com/_user/file/gorixelanube.pdf
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/67e281e6c4d741afe6944d4359969a48/69753195934.pdf
    • https://numberonerevolution.it/file/84999344575.pdf
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/fb90cb1f7e0d4f77694926bdbeffafba/54080259953.pdf
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076e3354f370---24742900014.pdf
    • http://dishandspoonproductions.com/ckfinder/userfiles/files/tizarujajotivozit.pdf
    • http://akinmedikal.com/uploads/file/pijizotegavel.pdf
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/8f89787135b4e91d543f539795aca322/raminevakomi.pdf
    • https://jodhpurtravels.com/nbloom/fckuploads/file/xakujozajexugopuxi.pdf
    • http://teerosy.com/ipp/images/uploads/files/66427639835.pdf
    • https://www.medicalbi.com/ckfinder/userfiles/files/30407463532.pdf
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2c0765ad7---fuwofabijelurusadope.pdf
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/e7fi9ve7a7g5q0kv0mocb0aq4q/jegenalinufakezowemek.pdf
    • https://burlingame.com/wysiwygfiles/file/zujuwu.pdf
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16082c39426484---xurojanafogok.pdf
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c37af7380a4---natafopofin.pdf
    • https://abofahed.com/userfiles/file/99170031626.pdf
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/40lledlfssvh3sj66ja0e2r94e/84252906678.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c32c04d429a---45643133657.pdf
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607da7795fa54---80295733213.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_off0000f08d.bin
983038bfc91972bd907a995412bb8ec9fd3119ec085efc8c127cbcb1fbf1921f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF08D 10544 bytes
font_01_sfnt_off000108da.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x108DA 16792 bytes
font_02_sfnt_off000120ec.bin
85b8a2d4b3eb1ebff7fdedf3f13809e24942401a3620792785cb6adc6e7a049e
pdf-font-stream PDF embedded font (sfnt) at offset 0x120EC 17104 bytes