Malicious PDF — malware analysis report

Static analysis result for SHA-256 2070db93c1701a30…

MALICIOUS

PDF

82.0 KB Created: 2021-07-21 22:05:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 56fcbad440c30314cdeeda1c9a549b22 SHA-1: 1a6c127db811adc13054c21a44b7e8a6f6b1b3e9 SHA-256: 2070db93c1701a302507af70bebd1b16633dec40da9e7f6cd2845b01034faabb
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous links to compromised websites and disposable hosting, suggesting an attempt to distribute further malicious content. The presence of a 'download button' lure reinforces the malicious intent, likely to trick users into executing a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://amuseonline.com/absite/userfiles/file/xodefiragox.pdf In PDF document text
    • http://www.odnpoznan.pl/fotki/file/file/nomibofanari.pdfIn PDF document text
    • https://manuscripthandler.com/userfiles/file/nisawavuxinisedemovebabe.pdfIn PDF document text
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/fb4bf7c23cec38692ab16256c3be6cf2/71944997455.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609866e107878---rifudixusosomezeboxokaj.pdfIn PDF document text
    • http://candemdientu.com/Images_upload/files/81087642450.pdfIn PDF document text
    • http://abcbyspu.net/ckfinder/images_store/files/xesodo.pdfIn PDF document text
    • http://mrbossamktown.com/uploads/files/75253205134.pdfIn PDF document text
    • https://businessservicesuk.com/userfiles/file/69626915819.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2b938759b---79949079670.pdfIn PDF document text
    • http://mg001.cn/upload_fck/file/2021-7-4/20210704135421449330.pdfIn PDF document text
    • http://tortsurprise.ru/upload/redactor/files/31776045238.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/4547712466.pdfIn PDF document text
    • https://bilegt.mn/userfiles/files/27769983220.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/16083301f9290f---zubivagebepipopoto.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd262977166---45226097758.pdfIn PDF document text
    • http://biurod9.pl/public/userfiles/file/55419192785.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160954fb1693eb---43842265786.pdfIn PDF document text
    • http://mmbc.cz/_data/user_files/file/79893509286.pdfIn PDF document text
    • http://goreskyreunion.com/clients/b/ba/ba087d28c24afe6c5bc45fa062332e47/File/dijunaso.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/butd5mhp4r39ea392kdcjdojor/17953286544.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/19925649241.pdfIn PDF document text
    • http://giovanniseneca.eu/userfiles/files/44378310141.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/8a95c21b8ac0de669ca71d39c0ed6f2e/zudizaxutomup.pdfIn PDF document text
    • http://abpaluso.com/upload/file/baxagewadosexekovudir.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=peter+lynch+books+learn+to+earn+pdfPDF 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_off0000da31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA31 10972 bytes
SHA-256: a5cd3364b8d725ba9e96d00b515c2f526da8b832e592f5999f15ca0c7783efd4
font_01_sfnt_off0000f377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF377 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010b89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B89 16928 bytes
SHA-256: 16a4d2931f40514b9b4159e3783b5f9697d4c4bbf9ce5b8218cbc7b50e223fb7