Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e162ed9868c6294…

MALICIOUS

PDF

95.0 KB Created: 2021-07-24 22:29:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 08d32505dd8b749a085cc0e2d7335189 SHA-1: 352661f825dbf13cf0b889899266cd37bba643af SHA-256: 9e162ed9868c62940a47dfa4f2942898e0e0cc6d729520f2f50e02feee02f601
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection to these malicious links, which are designed to host further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc9581e98c5---93288545556.pdf
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160d91875cb854---nojelipipiwul.pdf
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce0fc20ece---kiwofagijalusixatemulut.pdf
    • http://polimak.pl/userfiles/file/jetonozaxijizugotejiwix.pdf
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9a28c69a0---35837787640.pdf
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab8a82687c1---41934404551.pdf
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160f2ce787e6c6---gipolixok.pdf
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16095fe3c1a40d---loludexije.pdf
    • http://cloverdiamond.com/file/10551301387.pdf
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/45a55cca69eb547e74270a4d6c043b7a/61390766322.pdf
    • https://burragebrothers.com/demo/jolie/beta/userfiles/files/xesanudorada.pdf
    • http://perilatomsk.ru/ckfinder/userfiles/files/xipekogosufowasewapere.pdf
    • http://kozelskadm.ru/files/uploads/files/65127340336.pdf
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b296f023441---74725472912.pdf
    • http://infinity-pro.ru/userfiles/file/60189646536.pdf
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087a94379ccb---78452952514.pdf
    • http://bidmitt.com/img/files/file/tomuxosimezatikaku.pdf
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd1d661e51---9090231956.pdf
    • http://nassagroup.org/app/webroot/js/ckfinder/userfiles/files/46660239040.pdf
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f2b5da9ec3---18399443132.pdf
    • https://hiampelectric.com/wp-content/plugins/super-forms/uploads/php/files/7b2ac051b88ad7f264d7ca23b500b5f4/duvabito.pdf
    • http://innotec-industrie.be/userfiles/file/fevedasowetizuvi.pdf
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607edf464676c---fupemulijed.pdf
    • http://ahcxdq.com/uploads/file/090351051506.pdf
    • http://prttour.ca/FileData/ckfinder/files/20210602_EAFFF0EC24991329.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=cuantas+pulgadas+cubicas+hay+en+un+metro+cubico
    • 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_off00010bd4.bin
cc08b7100d62c335d8cf4fb11e3cd0e1c795bb6323a47921c3384e29e61ad09b
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD4 11344 bytes
font_01_sfnt_off000125ee.bin
846aa84c519ff89caa727a12f537847f71773ef81305c6dc2513d722821ff440
pdf-font-stream PDF embedded font (sfnt) at offset 0x125EE 18240 bytes
font_02_sfnt_off0001545a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1545A 16792 bytes