Malicious PDF — malware analysis report

Static analysis result for SHA-256 74be41715d8b6166…

MALICIOUS

PDF

75.2 KB Created: 2021-07-03 07:30:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 98bd4713a4cea5413f25902d8b59f4b1 SHA-1: f868866086f1d363bb145859805ed973f9d4c4a4 SHA-256: 74be41715d8b6166bced81147704b9109d91a072ed214832d63d15643e9dfd83
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites and are structured as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution through these links. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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 https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/7e4b623ce951e5f65689242619bd8576/ranagaliwadubepin.pdf
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/0eeb6e39ec0f48587f72065c7d57d448/kipewoz.pdf
    • http://www.abcklima.hu//data/editorfile/xixefapewusalifuw.pdf
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/710791e933d665ea20142713ff962717/28979300091.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfe06ab9259---rixafakenodotefojatopamu.pdf
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/3e5122feef7cfefde923040c4f129e37/91032791992.pdf
    • http://feach.ie/images/uploads/file/xexunimazamufedixeja.pdf
    • https://kozhikodedeaf.org/admin/my_files/file/45897730718.pdf
    • http://ahdjcm.com/upload/files/lotexozuzotuperetazen.pdf
    • https://qualitymattressfactory.com/admin/userfiles/file/27942318595.pdf
    • http://iswii.net/ckfinder/userfiles/files/37406214949.pdf
    • https://alexandrapanayotou.com/web/images/static/file/vewijixejunegoga.pdf
    • https://sasalidayanisma.org/uploads/file/34445828547.pdf
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607e95e5c9974---78249762165.pdf
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160a0254ecee4f---83169983564.pdf
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075ed811502b---xezumakixelutonufadabisex.pdf
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/1486881b1f4426a618e3e93eb2e21858/ratomigodegon.pdf
    • http://sity-luxe.ru/userfiles/file/jenetimuxodu.pdf
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c7c99e73d1---55435342292.pdf
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606c783ecbe3e---tubebubirutawitiremoku.pdf
    • http://gw73patriots.com/clients/1/1e/1ed986c9d410becccfd9995a8318e329/File/watisoxolitilovo.pdf
    • http://elementsgogreen.com/userfiles/file/bakanovetorezorabev.pdf
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160829347b3502---purubelopigemesidedet.pdf
    • https://sjalikave.hu/pictures/file/zetofarosufinivukisogit.pdf
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc2c34fa45---31940871262.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16076f03831683---22257065344.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=news+television+ratings
    • 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_off0000c79d.bin
312d2b32c516c1aa0ecbf4be6200721ccd51c29e470fae0215ceaa53dca1a03f
pdf-font-stream PDF embedded font (sfnt) at offset 0xC79D 15876 bytes
font_01_sfnt_off0000f0a2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A2 16792 bytes
font_02_sfnt_off000108b9.bin
6c15fdfafad5d867e5e077b16fca73ee94ac0de9486b63d2719e3cce7a8a8312
pdf-font-stream PDF embedded font (sfnt) at offset 0x108B9 10412 bytes