Malicious PDF — malware analysis report

Static analysis result for SHA-256 97508caadced50dd…

MALICIOUS

PDF

91.9 KB Created: 2021-07-03 10:53:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 25ab5274af379e15029e4b9b93ac7f22 SHA-1: fabb883a8ebd61aecedd6fd02ef575fe41394b8f SHA-256: 97508caadced50dd4f78b09dae86c09cbf3e883467f9d86211304b318a186ac7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous embedded links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/eb64f332eb349c5e37ba6403029c72f5/75313893284.pdf
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/616191ffddd6d3c78a2e2b54660d03eb/50782365256.pdf
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/45b5c4b85f2ec8a8a5a312f606d5709d/purefunimijanulexusidebiw.pdf
    • http://interel-rus.ru/test/sites/default/files/file/xudotuboperazududisav.pdf
    • http://kutyasturak.hu/images/files/xifiviwividefo.pdf
    • http://kaithompson.com/userfiles/file/69555312485.pdf
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/s9emcqqea1cvtbpvt1jtfa7bvu/vovimadesuvanekuxasajarel.pdf
    • http://ipceurope.eu/assets/file/donakuduxugis.pdf
    • http://eyupsifalibitkiler.com/resimler/files/25939075355.pdf
    • https://aiaciran.org/cache/fck_files/file/sogunosap.pdf
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ea70daa1bc---buzuwagimatofaxokezawagex.pdf
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160993c1036f21---towolomapezan.pdf
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/2v9nd71h4ksqstt3gtehuf83eq/74806087179.pdf
    • http://tpdw.pl/userfiles/file/gobebekedisogeno.pdf
    • http://emons-verlag.net/testarea/cwsCMSlight/media/files/45030482720.pdf
    • http://gulfcoolcontracting.com/uploads/userfiles/file/file/60374958656.pdf
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b053e00f5---4499452111.pdf
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608453cc994e2---gukutugizi.pdf
    • https://tese.in/ckfinder/userfiles/files/sefifojalonif.pdf
    • http://burmeseburmilla-allevamento.com/userfiles/files/fakinufeto.pdf
    • http://harringtonandlombardi.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/3233262431.pdf
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c03ff61fdb1---42439875427.pdf
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c5397d39a0c---72939227972.pdf
    • http://helloshoppingnepal.com/userfiles/file/xexuzepugeteladuf.pdf
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d01bd955c1---kotusuzozora.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=download+kmplayer+pro
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edeb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEB 16792 bytes
font_01_sfnt_off00010602.bin
90fc8aac9ac7d366edc3ad00430f6542601fec0be45c0fa5fa97b64e9a6197a4
pdf-font-stream PDF embedded font (sfnt) at offset 0x10602 10488 bytes
font_02_sfnt_off00011dd7.bin
b93dadf7ee88652fa401766b8f7569df4017c1ee2c559af3a2dcd5e3266c072f
pdf-font-stream PDF embedded font (sfnt) at offset 0x11DD7 17528 bytes
font_03_sfnt_off00014bc7.bin
7d15b2d6d265aaca51dda18faee70a1b8fa9d95ed54cb111fb0895789092f9ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x14BC7 16312 bytes