Malicious PDF — malware analysis report

Static analysis result for SHA-256 95a49440c3453dc9…

MALICIOUS

PDF

82.5 KB Created: 2021-09-11 21:11:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3e20764b7b90916fef08ee85e56dcb32 SHA-1: b8671c806b2c2892e0bc627c2f8edaeb980d3e1d SHA-256: 95a49440c3453dc9c54199cf9dadf8bc3bd3401d33c869f9d195309ae2d790b5
156 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious. It contains a link farm pointing to multiple compromised WordPress sites, likely intended to host malicious files or redirect users to phishing pages. The presence of numerous distinct hosts and links per host suggests a broad distribution effort.

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://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b1ac157039---jujekerikomogapomajajelub.pdf In PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/161329888e0392---94257956378.pdfIn PDF document text
    • http://saharun.org/uploads/ckfinder/userfiles/files/tidasukadubirepanowozo.pdfIn PDF document text
    • http://telegid.tv/userfiles/file/97886325765.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/308852ef31a43a8f0e8866d4f3fb1ee2/3068785517.pdfIn PDF document text
    • http://6nergy.fr/6nergy/sites/default/user/file/kugisoko.pdfIn PDF document text
    • http://hnc2.com/userfiles/file/rizelisuwutebezile.pdfIn PDF document text
    • https://cartolmania.it/file/bajebuvoxebomajabaxifef.pdfIn PDF document text
    • https://capital-publishing.com/ckfinder/userfiles/files/49058906884.pdfIn PDF document text
    • http://smartickgroup.com/userfiles/kakep.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135d9948216f---rixita.pdfIn PDF document text
    • https://editions-tlp.fr/ckfinder/userfiles/files/26311251348.pdfIn PDF document text
    • http://solarissoft.com/img/userfiles/files/95412285170.pdfIn PDF document text
    • http://chupanhnoithat.vn/upload/files/ponaxax.pdfIn PDF document text
    • http://evola.it/userfiles/files/93809472152.pdfIn PDF document text
    • https://www.dooleysnaturalgas.com/ckfinder/userfiles/files/zixazijoxemuzofupugiveme.pdfIn PDF document text
    • https://strongpointmarketing.net/userfiles/file/65149639628.pdfIn PDF document text
    • http://syntrend.critical.tw/upload/files/56227638936.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613c19d81c3d6---85235361561.pdfIn PDF document text
    • https://ww150001.linebot.net/upfile/files/20210909131857.pdfIn PDF document text
    • https://glamweddingdesign.com/userfiles/file/43326831296.pdfIn PDF document text
    • https://capecoralliving.com/media/file/xunatasepeg.pdfIn PDF document text
    • https://pima-alarms.net/slicice/file/furugowereraluxawubofabam.pdfIn PDF document text
    • http://spodne-pradlo-2bpoint.sk/UserFiles/File/josefakumumawureropemexig.pdfIn PDF document text
    • https://vegastel.eu/components/com_mijoshop/opencart/image/data/files/30364929835.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=android+tablet+resolutionPDF 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_off0000dd80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD80 18420 bytes
SHA-256: 898188ffb54013fdffd40cb4163d057d81d0f525615d7b06fff17154ba422b38
font_01_sfnt_off00010cbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CBC 10460 bytes
SHA-256: 6c80accd5cac2a390e843930ddce6ab9fa6bf0b97fc573fdb4d5ee46bfe8ae80
font_02_sfnt_off0001249c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1249C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1