Malicious PDF — malware analysis report

Static analysis result for SHA-256 68ed2d59b1a9994e…

MALICIOUS

PDF

79.3 KB Created: 2021-06-26 11:05:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 2d59e7a59c240d991204dbf0dd243094 SHA-1: 3f8dfcfb43e7b19a8fd1a67b17eefb15072931ef SHA-256: 68ed2d59b1a9994e3fc215426f61925557ab80ef0638601de7b7028fd6d29aaf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised websites, suggesting a phishing or malware distribution scheme. The presence of external URI links and link farm patterns indicates an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://ketchas.ru/uplcv?utm_term=learnwell+social+science+class+6+pdf PDF link annotation
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb18789e29---tenawinibapik.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608d93ac188a7---nelelotuxadibekilepir.pdfIn PDF document text
    • http://hasici-pristroje-eshop.cz/files/file/suwamaxuwilazagad.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc1ac14f94---bezofupadutodumizuvibuk.pdfIn PDF document text
    • http://eperon-kochersberg.com/img_db/48840665017.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b907f37422d---wafixedifaluguzinij.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b183c4f2097---feguwogobusetuxup.pdfIn PDF document text
    • http://dkyangmei.com/uploadfile/file/2021062504280173499.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b28f6651538---xinatipoleripagalenotepa.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/c6d90111598cd8349aaadab8e49afa5d/pidowigug.pdfIn PDF document text
    • https://calmoinc.com/upload/editor/file/6680856334.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae1efbaf90---16368613575.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/16078b8cac988e---jesaxonoxitaxurijuguxene.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607726dceb38a---68046536865.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/1607e05646b293---kowugoxatatujeg.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/ea32b53d504f4ccc50d727dfde6bb061/julonesunotimot.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/7js73g86ruv62aqpi06fha2gm3/wotunikamubogel.pdfIn PDF document text
    • https://larrialdiak.es/files/galeria/files/bopukufavozowaxuretipub.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/ruzulerijorolet.pdfIn PDF document text
    • http://daugiavanthienphuoc.com/media/ftp/file/jafemamojafubowarezutelar.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/72479584484.pdfIn PDF document text
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/4ce4bea773197f30d49d338de9addc32/48408929084.pdfIn PDF document text
    • 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_off0000d47b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD47B 16476 bytes
SHA-256: 71dc2df3f4ec717f4d113b34b451757484748cb11de688cd55f8ebf11a8391b3
font_01_sfnt_off0000fee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000116fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116FC 10724 bytes
SHA-256: 6751ba0beedb24d8ed8874f7fb4ecfa87da263b3ad93b60735d3bec84ac17707

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