Malicious PDF — malware analysis report

Static analysis result for SHA-256 6267beb53b7e2891…

MALICIOUS

PDF

69.0 KB Created: 2021-09-12 15:00:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 6aa609c604ed7ea71a390a121bdf7579 SHA-1: 3168a1ed955b8fd18d6dec1db017f3cd7c3f156f SHA-256: 6267beb53b7e2891f843b291970e23476e7d455a520903f76275723591a89880
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to numerous domains, many of which appear to be compromised WordPress sites or disposable hosting, suggesting an attempt to distribute malware or phish users. The presence of a QR code lure further supports a phishing or redirection attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://jagamimpi.info/contents/files/51718659767.pdf In PDF document text
    • http://speckletrack.com/update/editor/file/sozefixapusowobumelufunex.pdfIn PDF document text
    • http://szm.hu/userfiles/file/6568154988.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/lfl0slkdbogr29grbku56vmv1s/mefob.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138a41eed53a---divosi.pdfIn PDF document text
    • http://hasanmasat.com/ckfinder/userfiles/files/wedemubiferobulofadol.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133189a63853---kamibugaporefuletomoki.pdfIn PDF document text
    • https://akvaguru.hu/user/file/35648856388.pdfIn PDF document text
    • http://yaan121.com/uploads/files/202109071937417946.pdfIn PDF document text
    • https://adikkeempat.com/contents/files/88343832488.pdfIn PDF document text
    • http://oldmotorsclub.com/files/file/88354899815.pdfIn PDF document text
    • http://grabnerestriche.at/12181807033.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/50091637275.pdfIn PDF document text
    • http://uzunlarpeynir.com/dursun/upload/files/78183621214.pdfIn PDF document text
    • http://www.ez4parcel.net/upfile/files/2021/09/05/28656640861.pdfIn PDF document text
    • https://www.kuwaitpolyurethane.com/ckfinder/userfiles/files/gukonekulosibas.pdfIn PDF document text
    • https://santa.my/images/users/00000000/files/diruribamivalizib.pdfIn PDF document text
    • http://commandhousecreations.com/uploads/files/23943582172.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/a45d60610a536871987884b59a3018e5/bajezefanoruwu.pdfIn PDF document text
    • http://umhouses.com/uploads/files/duxixikinejetubobuno.pdfIn PDF document text
    • http://jmlukanich.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/91540835859.pdfIn PDF document text
    • http://jplus-ag.com/upload/files/BodyFile__61386497EE7B6.pdfIn PDF document text
    • http://9y.bfage.com/upload/files/20210901233819.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+get+whatsapp+new+emojiPDF 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_off0000af95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF95 15260 bytes
SHA-256: e07f41ab1fe26d3cd0f40037b1e18d1e5d3467b743a844fc8a9033daec196dda
font_01_sfnt_off0000d62a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD62A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ee41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE41 10760 bytes
SHA-256: 4395d667e9f6b201797aa78a5878715433efe1401617d35102596ea144d8d8c0

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