Malicious PDF — malware analysis report

Static analysis result for SHA-256 47a0b224eb7cdcff…

MALICIOUS

PDF

71.3 KB Created: 2021-09-07 17:04:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3cd6384a62222c5d963b937826ba8c45 SHA-1: 396c92e334cf2b6184597a44ddf76400756bf395 SHA-256: 47a0b224eb7cdcffa021d274abc7c3e4058843b3375d194d7c32902db6c3ab94
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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 http://cobe-ing.it/userfiles/files/tuxosujoserubetomebafo.pdf
    • http://mywayrtk.info/userfiles/file/pagazerudalurunimufuxivet.pdf
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608be5d37b9b5---magilimularasazopebile.pdf
    • https://pristineleather.com/userfiles/file/29831303759.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609410f9c1778---vunagematefapejulu.pdf
    • http://luingpyrex.cz/foto/Image/file/wexezosapav.pdf
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bd74945d64---zefaropu.pdf
    • http://donghozibistore.com/luutru/files/paliburolovobukuwesod.pdf
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/16108249476404---32117232043.pdf
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/9b0b748e47bf18d6953123c23d0a5317/79613015717.pdf
    • http://thaihotelsale.com/FileData/ckfinder/files/20210808_DBAEC0EF9480E454.pdf
    • http://vividconcept.in/userfiles/file/jurenotubaj.pdf
    • https://badrivishal.com/media/74648622279.pdf
    • https://ecohort.info/userfiles/files/52721486062.pdf
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/f19f7395e22acc5a8bedd48d5d269740/tukasodudupanatozuguw.pdf
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a64bf595845---bupurininelixof.pdf
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160b7114ea0362---67220385708.pdf
    • http://brukbet.com/user_images/file/menasazaxubudikuxaf.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/ksthguraenrkdtlhu172ntq3r6/minolaxobojixozap.pdf
    • http://kehlux.lu/userfiles/files/tadavonedi.pdf
    • https://laatjehuisweerstralen.nl/upload/file/45003363412.pdf
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/2d5e002068d6548ed15005f5bf029c6a/defutusemud.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=principales+representantes+del+conductismo+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_off0000b471.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xB471 16792 bytes
font_01_sfnt_off0000cc88.bin
ea8ceb6906ef9a64c8cded32652971fcecd34bfc9aebe955f4aa7e7d0b77177c
pdf-font-stream PDF embedded font (sfnt) at offset 0xCC88 10884 bytes
font_02_sfnt_off0000e5a9.bin
5af8eb14ed1b9ead1e0de86b86697206d2ef42458c8d28fd7d90e928fe28ebba
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A9 16512 bytes