Malicious PDF — malware analysis report

Static analysis result for SHA-256 7849a271ce250d79…

MALICIOUS

PDF

95.6 KB Created: 2021-08-13 13:43:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: cc6219e4c30e6adf201b534732b1ae86 SHA-1: 51af136ac9b8057f467d046729260e012577a915 SHA-256: 7849a271ce250d79fc4569211673b4da149bd0da2fbab45b36bda2c5134b8ad7
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for these links, further supporting a phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9673

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://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/864ss07cfe9hm1v7npogsinudo/38424739794.pdf In PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7588a20a41---81047654916.pdfIn PDF document text
    • http://ainut.fi/userfiles/file/woganubetujozifom.pdfIn PDF document text
    • http://poorclarescork.ie/images/ranitibalaribulas.pdfIn PDF document text
    • http://wf515345.tw/CKEdit/upload/files/borewipuzikinumobe.pdfIn PDF document text
    • http://evola.it/userfiles/files/75643287812.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160920743a0965---febim.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/eebaa1e56d05e330cd1d42fcfffae71a/navarirozele.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/06a9d4879530c633b24cc76655e8e832/solakasasegexiji.pdfIn PDF document text
    • http://exmar.it/foto_fck/file/tagitowozigisufidosibitus.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/f1c4b65e09be433de6b68c72db3a351a/fuxifofonunazej.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/fbba5346f51ae73301314889714e4a96/gogekitatofivaliwi.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f9e00f68b6d---mepavotobopegiripugadomiw.pdfIn PDF document text
    • http://langfordfinancialservices.com/userfiles/files/61719136051.pdfIn PDF document text
    • http://fxmeat.com/upload/file/a6ba87701dac3c92b46daa877f068823.pdfIn PDF document text
    • http://fosterfreezesantarosa.com/uploads/files/37500447779.pdfIn PDF document text
    • http://bakoca.hu/files/file/disunoxilosuje.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160800a163c035---xekiwopukiwolokumi.pdfIn PDF document text
    • https://wfca-czech.cz/temp/userfiles/files/vekotowowakukomulo.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/ae4d4848c6fff0196f743ec0fa93556d/9446876988.pdfIn PDF document text
    • https://journeywithmypet.com/ckfinder/userfiles/files/parudojija.pdfIn PDF document text
    • http://mstreatmentadvances.com/userfiles/files/kibedofifowine.pdfIn PDF document text
    • http://niszczeniewaw.pl/userfiles/file/nutumaboxagevuriti.pdfIn PDF document text
    • http://ekotronic.eu/files/file/8775083097.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc6dd087cf8---81372573616.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc9a4bc6a0c---17025151526.pdfIn PDF document text
    • https://vicotelecom.vn/static/source/images/file/tavozelitif.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=dragon+village+m+team+guidePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB86 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd
font_01_sfnt_off000110cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000128dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128DD 17392 bytes
SHA-256: 785628052c90bd55d6a9f750aa651c0e4bb5b8ccf003454da9941be636ba928c
font_03_sfnt_off000156aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156AA 10592 bytes
SHA-256: 826f9f8bec203c7bf1f32b1325a0b95d15c69ac816f0cc4ba0d273f09b5de43c

Open this report in the interactive analyzer, or submit your own file for analysis.