Malicious PDF — malware analysis report

Static analysis result for SHA-256 727e72606cfe9a0d…

MALICIOUS

PDF

85.5 KB Created: 2021-06-28 01:05:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 34974196289a1e6108290fabda43cda6 SHA-1: e44e4d8e351b6cd0f4cc0e32d5e4f13d60c0272f SHA-256: 727e72606cfe9a0d59d467d6744aef9e5a2ae3f0d099de95133ed548e1c90d03
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ClamAV as a phishing trojan and by an ML classifier, indicating malicious intent. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm to distribute malicious content. The document body is heavily obfuscated, preventing analysis of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://tea-ra.com/user_data/upload/save_image/files/vozagudimepozefojaxanuf.pdf
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c0c717adcf---mowow.pdf
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c74818faf0---84974755316.pdf
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/sqhlehsjuqh4v8jvvlinagvnn9/81963886110.pdf
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/adf0c4fbf22166a29ca30ec740dc8d06/60189250323.pdf
    • http://kistours.hu/userfiles/file/57259243731.pdf
    • http://abw10thstreetne.com/uploads/files/52159150646.pdf
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d5a9d40b517---tetuxejepore.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e38346214e---9710453661.pdf
    • http://broadviewlibrary.org/uploaded_bvlib/file/tavesipodi.pdf
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160a841984676b---50508012592.pdf
    • https://onhimalayas.com/ckfinder/userfiles/files/25134187288.pdf
    • http://prociweb.hu/sites/files/file/ginezemuwunawozizeji.pdf
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/9l8susd0h4min6lis3rbv8gi8q/73693294430.pdf
    • https://diaochue.vn/userfiles/file/41841015641.pdf
    • http://adria-ex.com/images/blog//file/wemuse.pdf
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160af50f501bd3---43154559133.pdf
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/6151fe0fb564924e1b9466db71e9ada7/dukeb.pdf
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/a571e300b04fe8d4ee755de7350df973/98688352276.pdf
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/radegevodokixedigigevi.pdf
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/4a7e3d564c678001bc6fb80c2edba8ef/78492579047.pdf
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/s06auv2soepl3tl3ftv5qam7mj/54597273943.pdf
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a28b4d3d7f1---popasofiwabigoruw.pdf
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/bb7ff9661995fd61a0b4a63998843aa3/gevogoguvuzowawepofama.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=how+to+check+if+my+license+is+suspended
    • 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_off0000e9d6.bin
59929ba4be1a68133b155652d840d56c07d1d01642dc0e41a8d7a6c5c6c4b881
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D6 11008 bytes
font_01_sfnt_off0001033f.bin
5f81a5be9b9ebf6adc596da876ec0cc7092ba72d1c67e3511643cb5d4ae56bb7
pdf-font-stream PDF embedded font (sfnt) at offset 0x1033F 17292 bytes
font_02_sfnt_off00013072.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13072 16792 bytes