Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd0ee2555033a860…

MALICIOUS

PDF

98.0 KB Created: 2021-06-26 20:52:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e98e84cee200f5f52e8ab6144e454394 SHA-1: e5c7815856b28b3dd000ff98a0f945ced9e966b1 SHA-256: fd0ee2555033a8601ce88699e2febba9d481a344dfa42432a2b235664f9252ec
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm that directs users to multiple URLs hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were extracted, the structure and URL targets suggest an attempt to lure users to malicious content, aligning with spearphishing attachment tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160945b25877ed---77876146725.pdf
    • https://tidurmalam.com/contents//files/86848419656.pdf
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160841b2d65858---voxomakesuleb.pdf
    • http://akkoryazilim.com/userfiles/file/sirutomukomexibimanetixiv.pdf
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608c1c9904aa8---70651211667.pdf
    • http://bilmatbasim.com/userfiles/file/sutotokewiku.pdf
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/657194c1dc8414be388a2a92914bf508/nogewezabanedevewozo.pdf
    • https://himalayanthailand.com/image/upload/File/giresakipowo.pdf
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c3e16c686---rogixuzozojutenevewe.pdf
    • http://midlandhigh65.com/clients/6/68/682e31fde28f8c6bff7ebba57332ef5f/File/14177264657.pdf
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c5150e3e0a5---24000674317.pdf
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/smujdbsemmpk6mjnjqk2i1rggo/duxoziwolusexi.pdf
    • http://giftboxvietthuy.com/upload/ck/files/xilorazuvojomegezitudore.pdf
    • https://abugfreemind.com/userfiles/file/kuvitu.pdf
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16080cabba1a4c---7097940068.pdf
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609c1b60125c6---4885867596.pdf
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/96f5d85de6f1239036775471cff8cb32/sikafasijevo.pdf
    • http://konditsionery-reutov.ru/upload_picture/file/lutugidogefakajopasako.pdf
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a494e783d5f---maratenugopisowite.pdf
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/ogbhcvdtrlatjustgsdvuti0bl/sidatixujujeb.pdf
    • http://pamat.ro/UserFiles/file/koremezerawuja.pdf
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609281ffd1a59---76602369515.pdf
    • https://digidatadecolombia.com/wp-content/plugins/super-forms/uploads/php/files/628b7e28ab80b37a592a7c08ea7dca1b/48314654539.pdf
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e847429b9f---nezanonijiwuguliro.pdf
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609627aa5dec5---lipudosumexeli.pdf
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b97c7743102---13044055856.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=thematic+teaching+approach
    • 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_off00011e36.bin
4a5696c5951284e8c773189faa81ae26f24cd5e6fefdae6cc0d5d66a30278bee
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E36 17072 bytes
font_01_sfnt_off00014ad7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14AD7 16792 bytes
font_02_sfnt_off000162ee.bin
da65be4ce30af355131bd968d906167eab11b9645f55aeb7fe3c4316987315cb
pdf-font-stream PDF embedded font (sfnt) at offset 0x162EE 10568 bytes