Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cedb50442943f22…

MALICIOUS

PDF

83.2 KB Created: 2021-06-27 23:53:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 820e108a6bf8ce342d4456e485eb1e40 SHA-1: 5e7fef42718221c935fe0d6e0d13a540fa89f8a9 SHA-256: 3cedb50442943f2226fc7316ac1491664c0eeafa9595032693ec470cdf16a7b3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are typical of a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://rocincorporated.com/domain.com/images/dynamic_pages/file/38591785036.pdf
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/neaqjs7sal9qg9upl9ur8mj2im/18989666125.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088441f5b648---19969158862.pdf
    • https://dimensioninteractive.com/WYSIWYGImage/file/41053923534.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/2fa4dljito9aeramdd2uca0tkq/xudinopabutefowagi.pdf
    • http://cc-loges.com/uploads/file/jomemininuwipixofuxeg.pdf
    • http://zabradli-znerezu.cz/userfiles/file/sosawer.pdf
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eb82b39c8d---88806477289.pdf
    • http://szymonadamczyk.pl/uploads/fck/file/83659053939.pdf
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/1fn9msopat10n5m19m4m1dk5t6/petadoraji.pdf
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/hs70641aa3gf1qel9ko1bl0v05/66064206006.pdf
    • http://vyveva.eu/UserFiles/File/fujama.pdf
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/0goobri1qhqmprlghbccttpvbb/7448069772.pdf
    • http://poorclarescork.ie/images/sezojovoteporuvoforuw.pdf
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaf4d5663b0---40505106017.pdf
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b488d8cacac---53169280589.pdf
    • http://gustosandvic.com/ckfinder/userfiles/files/pimam.pdf
    • https://www.lashharmony.co.uk/wp-content/plugins/super-forms/uploads/php/files/rpbmc8cv2iqa7m9239spvcpsjk/gibagagunisofaxekule.pdf
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/16097e85ee2248---gumilakosador.pdf
    • http://longarmacademy.net/fckeditor/userfiles/file/niravokifomeputevefo.pdf
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/95pck6jovlihqau3ret6tibmuq/xifezedexuzunimixaweb.pdf
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/d867cbd342971aeabeb30c937bed15ff/joremofipotugex.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=pdf+to+word+doc+convertor
    • 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_off0000e394.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE394 16792 bytes
font_01_sfnt_off0000fbab.bin
ddaa40ea275b96377f026384fff091990414a64a6184288b1efc5a2f771c0f9e
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAB 10152 bytes
font_02_sfnt_off0001128c.bin
001a0d93c0f3a30cf7329834e3e2b97cdc2541f089bf5444f5a85baced2a5f66
pdf-font-stream PDF embedded font (sfnt) at offset 0x1128C 17560 bytes