Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbdd04028bac20a9…

MALICIOUS

PDF

78.7 KB Created: 2021-09-05 01:58:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e5b3167dc5d3dddc11f95f6ae3dc9449 SHA-1: 26e627efc2319defef7e55dc884ed6bed3e79cc8 SHA-256: fbdd04028bac20a94f7ac3cb964ffe8d7054d7acc50c62580610175e0bf7a841
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a link farm pointing to multiple compromised WordPress sites, indicating an attempt to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b3edd5a806b---kotomovilajefixadudufet.pdf
    • http://allasclub.com/campannas/file/jojadorerebubo.pdf
    • http://files.ibiza-ferien.de/file/nudidivitomenetanaxani.pdf
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160fba54ba882a---30305933245.pdf
    • http://crocepadrekolbe.it/userfiles/files/limopoxapo.pdf
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160b0653e1cd05---toxewuxugesi.pdf
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/cd506469de655cf43d45d8703b1eae06/kileze.pdf
    • http://ateliergermain.net/sites/default/files/file/sokodazinafebewujakemiv.pdf
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16086ee6f0d0a8---34880272588.pdf
    • https://hanakspotrebice.cz/eshop/ckfinder/userfiles/files/viwul.pdf
    • https://fwullong.com/upfiles/editor/files/zolonufenevuzotomiz.pdf
    • http://se-ty.ru/uploads/userfiles/file/tivadoxisupuvafabizufuv.pdf
    • http://baocaosudanang24h.com/uploads/image/files/waxofukixebuvobibet.pdf
    • http://wccflooring.com/userfiles/files/5715512306.pdf
    • http://cardealer-space.com/js/upload/files/sagozeralimozum.pdf
    • http://hainescentreasia.com/images/file/32998440840.pdf
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/849dc5796112bf2b4fcde5bce0d3421c/8253205663.pdf
    • http://livinglearningandworking.org/clients/e/e0/e05af8355f71d8da3aa90f500b9284b3/File/xisiwirizizitiropofuzaz.pdf
    • http://pbpharm.com/upload/files/85507356199.pdf
    • http://satakantaresort.com/user_img/files/fenogesunodasunuvezapa.pdf
    • http://mabo-meccanica.eu/userfiles/files/54570472189.pdf
    • https://dhesient.com/media/48933858491.pdf
    • http://xn--80aaae7amexjfdlfdfg.xn--p1ai/files/file/39895230179.pdf
    • https://prawobrzeze.info/userfiles/file/gubupewe.pdf
    • http://huntland.hu/upload/file/67356770156.pdf
    • http://5m-tti.com/uploads/image/files/38291968507.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=vsepr+worksheet+answers
    • 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_off0000d13d.bin
a5b7204e7218288697675e4f482bb6a2488e1e38ba5e0a1135730e3d48c5af20
pdf-font-stream PDF embedded font (sfnt) at offset 0xD13D 17356 bytes
font_01_sfnt_off0000fe0c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0C 16792 bytes
font_02_sfnt_off00011623.bin
931a1e75e6baa781c6b7fe69d4b0b27ce81155245019212b1be89fb83729c70d
pdf-font-stream PDF embedded font (sfnt) at offset 0x11623 10360 bytes