Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0e6a7079e7810d2…

MALICIOUS

PDF

84.1 KB Created: 2021-09-19 14:21:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2ee4c53d5f5282ae5b097c65357cdc46 SHA-1: cc3dfa369fa1d7f2785bb4a5015bfdadea805a57 SHA-256: d0e6a7079e7810d29864f9a99f0e8a06f471821b2233919f75a9b454459408c1
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, indicating a link farm designed to distribute malicious content. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics strongly suggests the document's purpose is to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://beruanglucu.com/contents/files/mowiwoxafanupepapekubil.pdf
    • https://skillmapmagazine.com/ckfinder/userfiles/files/96961901105.pdf
    • https://viettincapital.vn/upload/files/rujebakinakusugiz.pdf
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/161316b424b109---28386197674.pdf
    • http://fine-trading-knotwork.com/uploads/media/78454940789.pdf
    • http://cassotech.nl/site/data/ws/files/78064604985.pdf
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d79f5e305e---fijaratukeporegadewed.pdf
    • http://thrifthelp.com/flash/thrifthelp.com/file/4794514112.pdf
    • http://salocchi.it/userfiles/files/24927931022.pdf
    • http://24horasnoar.com.br/ckfinder/userfiles/files/67204309299.pdf
    • https://rm-parketi.si/uploads/8920968918.pdf
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d98b6e3afc---dogatuwigesarujosevi.pdf
    • https://www.edm-medical.net/ckfinder/userfiles/files/22309999661.pdf
    • http://tabletopad.com/images/file/dixudufejuxaziletavura.pdf
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/aeb70d3b822532d6e29ea7e2f3c0b906/dapimoxuwibova.pdf
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144b1c48fbff---40914947400.pdf
    • http://ogcdc.org/uploads/ck_upload/files/81765891225.pdf
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16142f89b7ac0f---nuvataxulekewuv.pdf
    • http://studiopedrazzini.eu/userfiles/files/bagobuvexevi.pdf
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/248107705f6990e45400106c2ca8b567/pukujajapi.pdf
    • http://asqcert.net/files/files/vugaripagizusajujoperazij.pdf
    • https://hgqq.hk/tony/churchofgod/ckfinder/userfiles/files/jagig.pdf
    • https://gulfsupremesa.com/ckfinder/userfiles/files/gogabok.pdf
    • http://appli-veolia.net/ckfinder/userfiles/files/tuvamurudimebuvapefesux.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=games+dev+tycoon+apk
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dde0.bin
93c7c15835ac26a9030850c489ae8f95931abe22ef3bba6f146f22f606747aa8
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE0 10748 bytes
font_01_sfnt_off0000f6b2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B2 16792 bytes
font_02_sfnt_off00010ec4.bin
c324130090be4a288e256d36773c8e6ef91c8b6c927eec800513246b8f353460
pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC4 19284 bytes