Malicious PDF — malware analysis report

Static analysis result for SHA-256 92926dc1d660a82a…

MALICIOUS

PDF

86.6 KB Created: 2021-06-27 21:44:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 81580c971546b8fe8a2df908a7f8d2b7 SHA-1: 418c11a36e26b59ab208c459922fe894e5efb6d1 SHA-256: 92926dc1d660a82a9cc45a4a69b0737f82168a345b47cf26fdedcce654c0468d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ML and ClamAV as malicious, exhibiting characteristics of a phishing or trojan distribution. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites and other domains, likely intended to host or redirect to malicious payloads. The presence of multiple PDF link farm heuristics and the ML classifier output strongly indicate a malicious intent to lure users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://dentalclinicbangalore.com/uploads/60325577585.pdf
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16099f01291b97---25752679900.pdf
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/9da26ad082ff3cb7b43617a90b4b5a58/16361459716.pdf
    • http://noithatsah.com/webroot/img/files/bawebumunugofarapotadigez.pdf
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a8329cd31c---fugajakunegotow.pdf
    • http://donkaew-furniture.com/ckfinder/userfiles/files/87182742378.pdf
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/7667ebbad5201e8b1b7ffa99997c7a03/tuvuv.pdf
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/1a6423a490a753b51fa55a0064ac3f74/zidaxewigusenoni.pdf
    • http://zwickerfoto.hu/_user/file/xapuborojirujim.pdf
    • http://houselandia.ru/files/61707973982.pdf
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd3aa58df3---57261795099.pdf
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/89e40f456d06795212cb93398763a65b/fogomazewapezigur.pdf
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca07feee1af---lerawulumidifejoj.pdf
    • https://rowadalbyt.com/userfiles/files/rotifunegusuze.pdf
    • http://hoitruyengiaocodocvietnam.com/uploads/image/files/60041783067.pdf
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/i98t0e9108mq57neak970iqb46/24318532223.pdf
    • https://fonixkoncert.hu/upload/file/44596398744.pdf
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/qv7gt1iad8ogpthj50fl32ubm3/18654684403.pdf
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/a131b859a1381fdbe3240887ad700919/79011723591.pdf
    • http://tulsamemorialclassof71.com/clients/84987/File/gixudipujilipepisizapuf.pdf
    • https://shop-ecobati.com/medias/upload/files/jofanolidaguzuzedekate.pdf
    • http://nensi.si/upload/file/74523756048.pdf
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/3flahpkmuhl3inqtiip4rccbfr/zoxumokalabovulajeg.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=make+a+sentence+with+effect
    • 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_off0000f022.bin
49fb28b9ba03c160c7e1f5be06d01ab85bc76e6629e29dd033db911637f909ef
pdf-font-stream PDF embedded font (sfnt) at offset 0xF022 17448 bytes
font_01_sfnt_off00011dea.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11DEA 16792 bytes
font_02_sfnt_off00013601.bin
4c79bc723a80012de118bd98ad218327e4d5d3fb33f5b4f51eb2c43ffea3d979
pdf-font-stream PDF embedded font (sfnt) at offset 0x13601 10340 bytes