Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd7f0fd94330c092…

MALICIOUS

PDF

97.1 KB Created: 2021-07-04 22:26:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 68aae5e9c76185c4bff1d1ad78c9e5ba SHA-1: 18566445618fd22111e682dde97514dc722a7074 SHA-256: cd7f0fd94330c092909b74120255e7e8e2592dfc4feaa400edbdfddcfcf7991e
156 Risk Score

Malware Insights

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

The PDF contains a large number of links pointing to various websites, many of which are hosted on compromised CMS platforms or disposable domains. This structure is characteristic of a link farm used to distribute phishing content or malware. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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://www.gabrielamaciel.net/images/content/file/pedagifuwomozaje.pdf
    • https://yuktogel.com/contents//files/dafefedalufuluvozukogisa.pdf
    • http://dok-vo.ru/userfiles/file/segidofo.pdf
    • http://terezmisszio.eu/files/file/xuvoriworadomomutuf.pdf
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/0987ad8a54ad630c7094cef91d5e6bc5/vezilibadinadugiwuf.pdf
    • https://www.swissfillon.com/wp-content/plugins/super-forms/uploads/php/files/808d556dfd85c981ee7f16b7b75b14ba/38189491607.pdf
    • http://greenbrier101.com/userimages/giwuxanizizekip.pdf
    • http://softwarefactory.nl/images/file/zisojoli.pdf
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/vduiojoeps8h3rmc5o9a22m2n0/17990459509.pdf
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/6d706a764fa79937e93489e3e7ae1589/81645148555.pdf
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/c203d300909d89a10cc75c49b56ac89b/wulekosarunubawoguvo.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609af8952525c---9482947415.pdf
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/660089be8e8b19349aaa40e107a04f68/zubapanetewo.pdf
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bcf0fb5d7c---16552122064.pdf
    • http://hatowo.com/app/webroot/uploads/files/wunigapa.pdf
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/203e5a36aa845bff20911c0d5c2db0da/75325921820.pdf
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a13931b7512---xitosuxet.pdf
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd630f43daf---jutugozatavodi.pdf
    • https://equator-maritime.com/userfiles/file/89792862708.pdf
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160aa44f675204---48866520319.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16071ae9b60702---kenix.pdf
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f660b0b228---99116772027.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/0c5aca9149cd25d4541a104810687420/20277992285.pdf
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/vuini7a41ps8qb2gqmcm40ldnr/furabovakamujozeleg.pdf
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096e89936307---8778694599.pdf
    • https://myupfield.link/wp-content/plugins/super-forms/uploads/php/files/kjrji35ggnjuvlirg3m68pelqi/pupozizudaso.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=town+names+for+stories
    • 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_off00011a1f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A1F 16792 bytes
font_01_sfnt_off00013236.bin
6b6037a18a27d2f61d9b79d5a6f13c66acb7e6d0e6a973eb76d505b6ee75a13b
pdf-font-stream PDF embedded font (sfnt) at offset 0x13236 10380 bytes
font_02_sfnt_off000149c8.bin
186a6ed417f2f6213a228cddcd7e131c7a07b4522e4b8ac763079ba931160e3f
pdf-font-stream PDF embedded font (sfnt) at offset 0x149C8 17488 bytes