Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ba0ce0abd9d462c…

MALICIOUS

PDF

70.5 KB Created: 2021-09-29 14:57:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: fbeff128e2cf9ffc8b4874cd5f7a42d2 SHA-1: 27dd6d229cb50c5b7339e8b29f70c5f5e6e58160 SHA-256: 9ba0ce0abd9d462c60206e54bb3a454eae23f513dc384d707347bf17683889af
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a PDF link farm. It contains numerous URLs pointing to potentially compromised websites or disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of external URIs and link farms indicates a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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=download+game+metal+slug+for+android PDF link annotation
    • http://stitesattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xujuxedalezajosewiv.pdfIn PDF document text
    • http://www.santabriganti.org/admin/ckfinder/userfiles/files/zuvawagesafogiwamo.pdfIn PDF document text
    • http://gddfboiler.com/uploads/files/64844272366.pdfIn PDF document text
    • http://gancza.pl/userfiles/file/9406578279.pdfIn PDF document text
    • https://ijtm.in/userfiles/file/79251023521.pdfIn PDF document text
    • http://www.tecnologycenter.com/admin/uploaded/fck/file/sokaluwokonigi.pdfIn PDF document text
    • https://cochleartudaskozpont.hu/files/tidowuxewaz.pdfIn PDF document text
    • http://cgpharma.in/cote_dor_import/admin/ckfinder/userfiles/files/61539967096.pdfIn PDF document text
    • https://moyaexpresss.com/ckfinder/userfiles/files/26384762808.pdfIn PDF document text
    • https://ms02bet.com/contents/files/zasezibofeg.pdfIn PDF document text
    • https://weilaimachinery.com/userfiles/files/bubukefazetarokexele.pdfIn PDF document text
    • http://teplo76.ru/uploads/file/tidokaletabilo.pdfIn PDF document text
    • http://kielcenoca.pl/files/file/46355487182.pdfIn PDF document text
    • http://demkapi.com/resimler/files/tatuvotonog.pdfIn PDF document text
    • http://namuvaldymas.lt/userfiles/file/rowisamonumimiza.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1614972dd0ca9e---fikomirupoxudefejixaji.pdfIn PDF document text
    • https://pima-alarms.rs/slicice/file/32264291585.pdfIn PDF document text
    • http://wadsoda.com/UserFiles/File/53330210746.pdfIn PDF document text
    • https://jbdclothiers.net/emailer/userfiles/file/1364389789.pdfIn PDF document text
    • http://phongkhamthienhoa.vn/images/files/15149750970.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/16134a0e0bfb4b---71948750531.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/c6lgcjqpgc32fcdi99efagh367/vowixugamad.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_off0000b1a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1A6 10884 bytes
SHA-256: dab6ce0f8981eea9b1836f2154cfe1c37254902c8f02759ff755ddc3d7bbdb30
font_01_sfnt_off0000caab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAAB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e2bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2BD 16328 bytes
SHA-256: 5e391c3a8d89d29c880faaf828b6c47d9105a323223e62745f9c4f7099b275fd