Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4ca7718ecaed2f4…

MALICIOUS

PDF

105.1 KB Created: 2021-08-04 23:03:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: b06a3d5bd73308108991520c2c9703f9 SHA-1: 5db2045665d6587d1116ff3f4c21c11fccbc5556 SHA-256: e4ca7718ecaed2f4f021cfeddaa2073c1e3c9788b25e81d3cc51b571b2f17f1b
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the presence of external URI links and the overall structure point towards a malicious document delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9885

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://laborke.ru/uplcv?utm_term=laiye+je+yaarian+full+movie+download+hd+720p+filmywap PDF link annotation
    • http://gdaniec.com/upload/files/39806502927.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/ludh6jcmdct8gsudueu2cqbdvv/julojoviroxubejedivaro.pdfIn PDF document text
    • https://mfdesign.hu/files/file/dixofobonam.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/a9d5d114eb06d707ff6bad9efa262010/24031322095.pdfIn macro / runtime command snippet
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/edf1391fd54d6a14dba6f5ae9e1d50af/15459972603.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/029a28ea45319e698cfa311809e07ac3/92856257157.pdfIn PDF document text
    • http://cesurmakina.com/userfiles/file/42247501868.pdfIn PDF document text
    • https://rpdev.org/ckfinder/userfiles/files/kifutufu.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e38606453c4---88748712994.pdfIn PDF document text
    • https://bazab.ru/ckfinder/userfiles/files/23972814333.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160935327b261b---nurukurajadiva.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/j0l3jmncs4pic5re22gkv3nlul/vetin.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/xurogavisasezoluno.pdfIn PDF document text
    • http://okuninka-biale.pl/userfiles/file/59466603546.pdfIn PDF document text
    • http://oxigensupplies.com/shipinc/userfiles/files/35275857789.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a581dc37598---15234187499.pdfIn PDF document text
    • http://thanhtindesign.vn/uploads/image/files/puvezidadisozifinonuluk.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/9883fa278658c2131efa0e4fc48fd14c/jujurozivas.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/a0776cac5589ded8a3c69cbe4b1bbed8/bagowutuwa.pdfIn PDF document text
    • https://panama4d.com/contents//files/84412305505.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160706ce5ddd35---fivulitejikukumirodupe.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b2ef221106c---ditet.pdfIn PDF document text
    • http://aimecostruzioni.it/userfiles/files/77296424307.pdfIn PDF document text
    • https://minipowerpack.net/upload/files/10343064622.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160719ce77ee65---gijosinufedozabet.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011ed8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ED8 17312 bytes
SHA-256: 29dd18ab3ab7db8a617ac98d46ef52f135dcd4347fb54603ec4eea2148a5b239
font_01_sfnt_off00014c3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C3D 11240 bytes
SHA-256: 2ed39bcd2d9ec733f3282fd417150089223dd49fedd792b173dd66e7a6d6e825
font_02_sfnt_off00016668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16668 16060 bytes
SHA-256: 8bfc5e2f6383778b4716e60c732a7e5228106b692ca52c1f6b3c0b2892049825
font_03_sfnt_off00017b7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B7B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.