Malicious PDF — malware analysis report

Static analysis result for SHA-256 f38b5ac737ae7852…

MALICIOUS

PDF

84.8 KB Created: 2021-09-01 02:25:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 00ca43e0017373df1b3ad2888f8a4622 SHA-1: 39f7a5109b51fb7b67968e2d331d50fdb951e67a SHA-256: f38b5ac737ae7852ab3d1bf1c56dd46233907bda5c0500cf2003f8c5ec45d83a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated high maliciousness. Heuristics identified it as a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting a phishing or malware distribution attempt. The embedded URLs, such as http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16073c725aece0---dalogewavudibuvanole.pdf, are likely intended to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://luingpyrex.cz/foto/Image/file/32508173242.pdf
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/d920568e142f83e23bbeaba9924ff891/kojuvuxavudetovo.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/ji6mm7hn1p432ck2112p4pbbd2/movixidimajimakafupuzuw.pdf
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/c86cku8lfevp3shdesammppi2t/vizexumasedivibugaw.pdf
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/16082696c5ca20---visesi.pdf
    • https://pestresolution.pt/site/upload/file/tixat.pdf
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16073c725aece0---dalogewavudibuvanole.pdf
    • http://unitez.net/images/newtech/files/nelibuzugitisil.pdf
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/70d53bc63856a9c7f1ad25e8ba6c2e4b/69642061764.pdf
    • http://mauchlineware.com/html/chapelstreet/web/userfiles/files/milaxe.pdf
    • http://harmonie-avion.fr/actualite/files/gagod.pdf
    • http://cuuhoatudong.com/upload/files/pabonolenokigodud.pdf
    • http://jonesfamilygathering.com/clients/2/28/28a2af4908f4fae7f70f8b91082c1e08/File/40097816090.pdf
    • http://bahattinburyan.com/userfiles/file/lizeti.pdf
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/77e775918896e8b59741122a0eec7422/98180846345.pdf
    • http://moneymaker-gold.de/files/56924401320.pdf
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a683594fe44---30256818690.pdf
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/ff14edbd5d6b5c97c631bc7b247bde89/nelusesufelaxemenaguxima.pdf
    • http://thedreaminitiative.org/Content/Admin/uploads/files/lisotonapax.pdf
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/f8a8060046c9cf681737ceb0cdc78325/84080875947.pdf
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/50hqsn72o7c1im5kmd1k5djvs5/59330697802.pdf
    • https://shatalarab-llc.net/userfiles/files/ledupasukibaxevugogerox.pdf
    • http://www.teeintact.com/admin/fckeditor/editor/filemanager/connectors/php/img/file/xawabazisatututat.pdf
    • http://cnwt.mgo.cool/upfile/files/2021/08/19/48214583620.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=pay+dartford+crossing+charge
    • 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_off0000e72f.bin
63839d4e55637948d434b959406fd9b97581843e41ad47922cd59b9df25e117d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE72F 10824 bytes
font_01_sfnt_off0000ffe8.bin
99423e4cf02bac3c389d3f5f56473d484459a64bd06d9e154cee60e66ddca822
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE8 17408 bytes
font_02_sfnt_off00012cff.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12CFF 16792 bytes