Malicious PDF — malware analysis report

Static analysis result for SHA-256 94dc60a47109d4a7…

MALICIOUS

PDF

103.1 KB Created: 2021-07-10 03:11:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9230a3d26b1210423985c3244a6d53ee SHA-1: 0599c23f3902b53c116a4aa2d46eb839a6e9d4ff SHA-256: 94dc60a47109d4a729bf6d13ebf4de5741e80561f6c9dcc9bf61934a15deab6a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous links pointing to compromised websites and disposable hosting, suggesting it functions as a link farm to distribute phishing content or further malware. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9790

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 https://garglob.ru/uplcv?utm_term=comprehension+passage+for+class+5
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607853da19a0e---wibelobifokub.pdf
    • https://ruiguoex.com/upfile/files/2021/06/04/73883870902.pdf
    • http://alacarte-grafik.de/userfiles/file/82010244929.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/33e2c8072343d5a1a3f07269b2c6f3ca/9730514046.pdf
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16072264c7562e---towenanoxezivefewujebix.pdf
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abf22085b6d---61787125862.pdf
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/56d90b49882e81fb4b77a37f4a9d356d/zewunamodojamesazupul.pdf
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1608f72385de67---72417965267.pdf
    • http://zulassungsservice4you.de/bilder/file/gebumazaxuvim.pdf
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/9cc4443364054658d92ababc6ca9a6dd/2483319953.pdf
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/16098473010087---lubisidigoguna.pdf
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/5ca0b1e691d7c97b773d929f1011a260/vifupa.pdf
    • https://toolsatool.com/userfiles/files/noxuvumigijuwi.pdf
    • https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4ac4ee782df4482c40f3434528bc3970/49161312817.pdf
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/fe7545b3877d15f23f58a50cf785ac9f/tojibuvodiwirevubijotuza.pdf
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1609330774bf8d---81233087134.pdf
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/37bbb3b6caf11472c7c5cbed0c8387ff/4009523051.pdf
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/9nv78gi010aa9hrpqnq4g9ja5a/nafudatorimenud.pdf
    • http://myexamadvisor.com/fck_uploads/files/powakupodowife.pdf
    • http://all-pass.com/folder/editor/file/52867127527.pdf
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b0a487131d0---kebomawozepepesuzufoma.pdf
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/16079de3d4389c---ruwake.pdf
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8e58b145ad---65006241036.pdf
    • https://atlastoursntravels.com/userfiles/file/4806964618.pdf
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ccce62c2f54---63678341841.pdf
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/16087156faa18d---38350989251.pdf
    • 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_off00012df2.bin
474bdda059095ec9596d8e150727b978ba7461fbdc84c84ddf5b79e59edbcc31
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DF2 18528 bytes
font_01_sfnt_off00015d3e.bin
1586052cc13224ab589025c886445ddd1f0bf6358cc7006cb7f93df0d76ec50f
pdf-font-stream PDF embedded font (sfnt) at offset 0x15D3E 10996 bytes
font_02_sfnt_off0001769e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1769E 16792 bytes