Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fec2b66d9c0c6ea…

MALICIOUS

PDF

88.7 KB Created: 2021-07-25 10:21:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7ff16e266f360caaba9a637f98a484e4 SHA-1: dc248e4e3c15ee7b95d7efd8851956a13b04d3f4 SHA-256: 5fec2b66d9c0c6ead2eec5fc2fc37d47e3bbb7abfbf8ab80f2cdd989b784bbdc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting it's designed to lead users to malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/ceb2eef575a806b2b413d2e29f43dea1/rikix.pdf In PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ffefd5df44---54177838884.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/u3c46d923kub305pv42cbratl4/79954623541.pdfIn PDF document text
    • http://savitaco.com/uploads/images/files/13636185269.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/111edb6cd73f9e62382df7d476cb131b/55134364401.pdfIn PDF document text
    • https://ikincielinmak.com/upload/ckfinder/files/20741949792.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/etkadco5luhk43v0tg3b6o6ohg/120427449.pdfIn PDF document text
    • https://cottingham-group.com/cufiles/files/28911997995.pdfIn PDF document text
    • http://ashioke.com/images/library/File/40620721436.pdfIn PDF document text
    • https://growyourmoney.in/userfiles/files/zidolomisof.pdfIn PDF document text
    • http://eaas-journal.org/survey/userfiles/files/pufupinekurelinotajazatut.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072fd5dabb3b---gosasikelaxizun.pdfIn PDF document text
    • https://tepihtrava.rs//files/zuzegetofimulavatela.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608f5a0bf1950---wudefekitudumunajelefet.pdfIn PDF document text
    • http://sbs-group.co/userfiles/files/kazetumalofatularoseva.pdfIn PDF document text
    • http://poultech.net/d/files/jogatisefixiredopuwuwit.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/fomabewaviguwapi.pdfIn PDF document text
    • http://hargrovefamilyreunions.com/clients/16272/File/wudulemiralatite.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606da151b1212---bulusolalizewomoj.pdfIn PDF document text
    • https://kingdomdatesuae.com/userfiles/files/84039375550.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d192b30c34---jubatasazegegorulidum.pdfIn PDF document text
    • https://kompaspt2.com/contents//files/limaj.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607698d596e7c---12965516972.pdfIn PDF document text
    • https://namratalakhotia.com/userfiles/files/reruwafixaduwoxavonu.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ede27f54856---vegenezovewafele.pdfIn PDF document text
    • https://hgb.se/filer/file/77531310342.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160854f8d31f5c---voped.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+download+rocket+league+replaysPDF 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://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_off0000f799.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF799 19792 bytes
SHA-256: 8fa45c29e7fac607c45759e1a164001c8d6f4b188faafdd58b49489d1f73cce0
font_01_sfnt_off00012957.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12957 10980 bytes
SHA-256: 75239c445ff2fccd8bcccc39df3b3d39f78d75adc9499bdb99154dca1007fa05
font_02_sfnt_off000142d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1