Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6feab6905d3f6ed…

MALICIOUS

PDF

114.9 KB Created: 2021-07-02 00:02:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 09e9c9a667cfd93024dd36652140c4c8 SHA-1: 4c0e2967460a950740a9c50c8ba2a102d2de8c82 SHA-256: e6feab6905d3f6ed36cb4f8e54448e32c724487747235329d8280256c2e00215
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous links pointing to compromised CMS upload directories and disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's a phishing lure or a downloader for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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://mdsalon.ru/img/lib/file/91129913455.pdf
    • https://badrivishal.com/media/gidiziv.pdf
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3a2d49b2e0---tetodulavum.pdf
    • https://sheenabusesandcoaches.com/userfiles/file/65911210156.pdf
    • https://lemanssrl.it/file/26232349615.pdf
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087cd5056393---dularolibatimamexavumug.pdf
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/87h1qfpafamfq6q0rsjho2g670/53422949488.pdf
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/16093c8c9535f7---75329312904.pdf
    • http://uticachemical.com/files/upload/files/fivivowegopuguw.pdf
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a13e95c70db---29868627051.pdf
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b86d178d30c---negesik.pdf
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/uqnqi3ksbk6uc7dr13n7qjp5q2/zumowamuzelegozazitonagen.pdf
    • http://nemeckystrakac.sk/editor_uploads/files/97639470534.pdf
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/b3f9d01984e227ee916e3961815f61bd/64095854715.pdf
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/d15f8ebac4e21fcc34a6982390290321/61322240698.pdf
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073ea7ccadab---5410371338.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160882c58e4dcd---muxozozoze.pdf
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/f69571c7480e14d005882234fa3aa835/pokukesotapulesamade.pdf
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/0nivqk4sl9itned76h2kfsrkes/38019355302.pdf
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16098a224ba553---tiguxilowuzaxorim.pdf
    • http://automsystem.com/UploadFile/file/20210628211002966.pdf
    • http://maekuangudomthara.com/ckfinder/userfiles/files/zarusifovixewogamo.pdf
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/ef6c26a5eda468f73159afcef0cc2ff5/nokijivubi.pdf
    • https://incoyun.com/calisma2/files/uploads/68415098867.pdf
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5dc287fbd---fotupamuxezitamovi.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=cape+canaveral+launch
    • 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_off00016116.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x16116 16792 bytes
font_01_sfnt_off00017928.bin
a5be371176fbb65202de61855c11866884ff126c6ebdf154ae5eb21cab296e44
pdf-font-stream PDF embedded font (sfnt) at offset 0x17928 17644 bytes
font_02_sfnt_off0001a7ba.bin
e3d773a5c093d78addc1a51e498bbfd34bb93d107318b0a65c96c7aa398f0a83
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A7BA 10188 bytes