Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4d79772f6a3a3fc…

MALICIOUS

PDF

85.3 KB Created: 2021-08-18 00:43:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3cc832dd021e24f432bc68cf3183f3ab SHA-1: f8226199f3e3e5965b4e7406fae15085e9e9ae9c SHA-256: d4d79772f6a3a3fcf48107907655f4c6c48e53a8f63945647c0550a603aded1e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains embedded JavaScript and a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites or disposable hosting. The embedded JavaScript likely facilitates the redirection or further payload delivery, contributing to the phishing or malware distribution goal.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://fdceta02.fr/catalogue_dynamique/file/falorovajeki.pdf
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/flec2u57kqtbittr01ci027n9f/38263740926.pdf
    • http://resheto.ru/users_images//fck/file/tobekabakovo.pdf
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f7328287923---11072266336.pdf
    • http://blevy.com/ckfinder/userfiles/files/bolewojozupovagumofexom.pdf
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16078afdf8fc41---50576590169.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/2810353710.pdf
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/kktr4t8aql2jvhf35a6r70tdot/gidetevojulikerije.pdf
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1608e20172d956---tapezuvilobegakogef.pdf
    • http://czytamzezrozumieniem.pl/userfiles/file/kavidosinikidonapiwebolif.pdf
    • http://geotersrl.it/file/35277526510.pdf
    • http://flirdining.com/uploads/files/bupoponezubusadavep.pdf
    • http://jeansresource.com/js/ckfinder/userfiles/files/50356304365.pdf
    • https://aimhc.com/userfiles/file/soxobavilomakemo.pdf
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16098d6b5a4260---renosuxi.pdf
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/a151ad0aeabb143876360abacfaed345/1239915065.pdf
    • http://ipublicity.cz/data/file/99649763517.pdf
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088df9904b9c---rifejaxevivi.pdf
    • https://autonoleggioassereto.com/file/32452064617.pdf
    • https://bikeid.net/ckfinder/userfiles/files/20970072811.pdf
    • http://sklepjola.pl/userfiles/file/selodirilesuropajek.pdf
    • http://podushka.by/files/files/wisojulavon.pdf
    • https://www.bistro-e.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607157fae63f4---vuvutu.pdf
    • http://getem.eu/files/file/64100563293.pdf
    • http://beulahcooleycollection.com/clients/870349/File/38715237991.pdf
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a53e4877a3d---pazuwuregixajirawira.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+put+a+wick+on+a+kerosene+heater
    • 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_off0000e9f9.bin
33693a87272b7b4db3c968d2936ed778d5d1849001b8059ee3f9a9f433a43ceb
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F9 16676 bytes
font_01_sfnt_off0001151d.bin
fef88052e136da5483812611748d3f43d04a0b7eda49c336e927403688dc161a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1151D 10692 bytes
font_02_sfnt_off00012daf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DAF 16792 bytes