Malicious PDF — malware analysis report

Static analysis result for SHA-256 e40eaf46cbb7c4f9…

MALICIOUS

PDF

80.6 KB Created: 2021-09-15 13:23:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 426a6ce9311e22d67c59b258bb7c5424 SHA-1: db405d95a37e8ab60b2124ddb19ae271d2526720 SHA-256: e40eaf46cbb7c4f9f422b3f017ade4c89958c2102d9c2210e15530cebe8ddb45
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS upload storage and disposable hosting, suggesting a link farm or phishing lure. The presence of 'wkhtmltopdf' in the metadata and the heuristic 'SE_LOLBIN_RUN_COMMAND' suggest the document may be used to host or redirect to malicious content, potentially for SEO poisoning or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://ripedzn.com/app/webroot/files/fckeditor/file/galivozamabajuju.pdf In PDF document text
    • https://liftsystems.ro/LiftFiles/file/69726106629.pdfIn PDF document text
    • http://www.novosib-sport.ru/ckfinder/userfiles/files/vogizejujolotak.pdfIn PDF document text
    • https://loyalangkorapartment.com/userfiles/file/dunusu.pdfIn PDF document text
    • http://knowleangling.co.uk/ckfinder/userfiles/files/livezavosodura.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613913a480af6---budeguwanasuxiwuranu.pdfIn PDF document text
    • http://abwingsbuffalo.com/uploads/files/wunutizenegivo.pdfIn PDF document text
    • http://rvhifi.cz/files/file/mosuganovakosinoziruf.pdfIn PDF document text
    • http://charmingcurls.se/upload/file/vuxotujanuboz.pdfIn PDF document text
    • https://profession-your-dr.com/uploads/files/202109091824064915.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612fa97873d33---mipamafurojidekaze.pdfIn macro / runtime command snippet
    • http://azstorestudio.com/uploads/files/62311661632.pdfIn PDF document text
    • http://toyotarent.hk/FileData/ckfinder/files/20210904_5640A00F3FDC8089.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/2e6c6424dde69220f2048c11b7e4f315/16202156782.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b56d0cafc1---36353769613.pdfIn PDF document text
    • http://think6.net/ckfinder/userfiles/files/20210908185305.pdfIn PDF document text
    • https://livre-art.com/ckfinder/userfiles/files/33256433226.pdfIn PDF document text
    • http://doo-san.com/userfiles/file/20210905001316.pdfIn PDF document text
    • http://gardena.crazyrockinsushi.com/uploads/files/sawaluluximeg.pdfIn PDF document text
    • http://inistor.com/ufiles/files/zanowiputikekeb.pdfIn PDF document text
    • https://hnhaa.com/userfiles/tnejp/files/laboz.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/gdbuucftebrrj9bfgonq2cv2g1/pitixekolo.pdfIn PDF document text
    • https://profession-yoIn macro / runtime command snippet
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=kako+dobiti+free+robuxPDF link annotation
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6CC 17836 bytes
SHA-256: 2380791b11e3873ca3bf2ed070062b1b10379dc9c8507d4e1583228eb89acdfc
font_01_sfnt_off000104eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104EB 10452 bytes
SHA-256: facc8b230dd2777c30cbb6ceda7929a1c6d7f3a11d2620d8cefa24d9e9809a7d
font_02_sfnt_off00011cd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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