Malicious PDF — malware analysis report

Static analysis result for SHA-256 47b2ffcd415afed1…

MALICIOUS

PDF

80.1 KB Created: 2021-09-12 03:05:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 3f43ed8178f4499912c516924412e243 SHA-1: a02dc0fcc323286cad78d9601e628d008339e1b0 SHA-256: 47b2ffcd415afed1664816fc292f48f8b897c7be1ce67a4cc1ae76e6085765ce
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://pixomot.ru/uplcv?utm_term=dual+boot+windows+10+and+xp+separate+hard+drives PDF link annotation
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1613006b5cb047---51735140005.pdfIn PDF document text
    • http://fujiya-la.com/uploads/files/kinalalelolakis.pdfIn PDF document text
    • http://ateliergermain.net/sites/default/files/file/nubofokalur.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613c0b36de46b---95555619126.pdfIn PDF document text
    • http://halongbaycruises.org/upload/files/gukat.pdfIn PDF document text
    • http://mlsconsulting.net/cms/files/File/75184842747.pdfIn PDF document text
    • http://scard.vn/app/webroot/uploads/files/konigopibogop.pdfIn PDF document text
    • http://szyqjsj.com/UploadFile/file/20210910214910725.pdfIn PDF document text
    • http://www.thaiboat.net/image/upload/File/92289205366.pdfIn PDF document text
    • https://traveletrust.com/basefile/traveletrustcom/files/patosefesokan.pdfIn PDF document text
    • http://smolninskayahotel.com/userfiles/file/fozulatasizawujifasusoju.pdfIn PDF document text
    • https://www.disbel.es/ckfinder/userfiles/files/jemofetevejasosubuj.pdfIn PDF document text
    • https://szamitogep-szerviz-javitas.hu/ckfinder/userfiles/files/47239656430.pdfIn PDF document text
    • https://makanbanyak.net/contents/files/sojakipolarun.pdfIn PDF document text
    • https://cailux.lu/userfiles/files/vebozevifijoboxog.pdfIn PDF document text
    • https://recapress.com/ckfinder/userfiles/files/30452956605.pdfIn PDF document text
    • https://madspot.dk/ckfinder/userfiles/files/wisevomiwovowupenavaj.pdfIn PDF document text
    • http://aircond.md/upload_fck/file/19258222724.pdfIn PDF document text
    • https://jnnjhansi.com/userfiles/file/5324824546.pdfIn PDF document text
    • http://sadiqandsons.com/userfiles/files/6064115492.pdfIn PDF document text
    • https://ww150004.linebot.net/upfile/files/20210909213237.pdfIn PDF document text
    • https://trompis-tondschungel.de/userfiles/file/gatulex.pdfIn PDF document text
    • http://bindashnews.com/userfiles/file/88843257103.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/525b39797e68c3fece70a4f3bc6427f6/89844394723.pdfIn PDF document text
    • http://euroteam.vn/ckfinder/userfiles/files/vumejezuxuxexufez.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3C9 17268 bytes
SHA-256: a095351c0ec2ec06f04d661928f88b8ccbf5054c28edcbdd1940ceec5ae1493c
font_01_sfnt_off000100f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F1 11160 bytes
SHA-256: 3cc4ae32195067e4e4ddb011dec0e160b416272cd47f2e4317ba962f6afd7f98
font_02_sfnt_off00011ad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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