Malicious PDF — malware analysis report

Static analysis result for SHA-256 be69efbf4deabd6c…

MALICIOUS

PDF

73.7 KB Created: 2021-09-25 06:01:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 03c7710b3e0b3c5957609a357c25142d SHA-1: 37f3b81d725b2e0f70c0aa94e7b0de08a715c013 SHA-256: be69efbf4deabd6cd71cf3cff59415d0effbd6f6c8304c203016cd637252a054
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to numerous disposable domains, many of which are hosted on compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://malir-naterac.info/UserFiles/File/53347919038.pdf In PDF document text
    • http://zhongyuemedia.com/filespath/files/20210914002824.pdfIn PDF document text
    • http://ashole.hu/UserFiles/File/66426231108.pdfIn PDF document text
    • http://bulgankhangai.mn/userfiles/files/sowaka.pdfIn PDF document text
    • http://gusanhightec.com/userData/board/file/68907028112.pdfIn PDF document text
    • http://aktasmatbaacilik.com/resimlerfiles/18483554054.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/dosomaguvosunu.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/48e9eb0fbd74797897686a719093a9e6/zemarabufo.pdfIn PDF document text
    • http://cissi.it/userfiles/files/14929553296.pdfIn PDF document text
    • https://emmaushuis.org/pages/keberapekifozerutazab.pdfIn PDF document text
    • http://worldofpacifiers.com/editor_uploads/system/files/47153235443.pdfIn PDF document text
    • https://strefaokazji.pl/uploaded/file/24609039319.pdfIn PDF document text
    • http://bebaldebaran.eu/userfiles/files/kisojitefatidexigosoxomex.pdfIn PDF document text
    • http://www.ocptecnology.com/admin/uploaded/fck/file/55161082418.pdfIn PDF document text
    • http://sanchariglobal.com/userfiles/file/24701360206.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/44899034750.pdfIn PDF document text
    • https://www.rosebankprimary.co.za/inc/ckfinder/userfiles/files/kodixizojotixisoxone.pdfIn PDF document text
    • http://cameragiaminh.com/upload/files/tiretawalaruvikifewa.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/954c787f394ec3a20909e4ab4883a8fa/47573849405.pdfIn PDF document text
    • http://vnationwide.com/userfiles/files/kixebejot.pdfIn PDF document text
    • https://technoarc.net/userfiles/file/93363731131.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614e9033e4444---lokurijotajot.pdfIn PDF document text
    • http://dgkno.cn/upload/16504868472.pdfIn PDF document text
    • http://thegioimaychaybo.com/app/webroot/uploads/files/50037623415.pdfIn PDF document text
    • http://jarauwerdaenzn.nl/userfiles/file/kixowitumem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=it+chapter+2+full+movie+download+in+tamilPDF 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_off0000b9b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9B0 11040 bytes
SHA-256: d874c297139526a308971fb3943f6002913d1c5fe9b0f743c4312d59c5abe394
font_01_sfnt_off0000d34e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD34E 17768 bytes
SHA-256: 2325393bdaab198417faf09a6f5eba04a7b8ccd71da2c86ec9bcb8e167badafa
font_02_sfnt_off000100da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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