Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e2f1c042813efb4…

MALICIOUS

PDF

74.3 KB Created: 2021-10-03 21:47:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 3f1f6a202c9d640c17c077204e8679f6 SHA-1: 3b2bbb6dd8b21f05468ad67d599b80bccdf34cb0 SHA-256: 0e2f1c042813efb4fac6344a1fa5bfea2243284c819997ae79decdb5bd0a5a36
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://k31szmq42-nu28.com/contents/files/20800501441.pdf In PDF document text
    • http://bilmatbasim.com/userfiles/file/77215718419.pdfIn PDF document text
    • https://truckforceone.eu/upload/editor/file/28716369309.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ce2c1511a3---4376607183.pdfIn PDF document text
    • https://pvcmikser.com/upload/files/funeserisirufebatekamixo.pdfIn PDF document text
    • http://lamexmarket.com/uploads/files/32323679607.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161374929b199f---57835833745.pdfIn PDF document text
    • https://olterus.com/contents/files/25842255314.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021091411553882.pdfIn PDF document text
    • https://unitjaya.com/contents/files/30751939969.pdfIn PDF document text
    • http://montereypark.kopanramen.com/uploads/files/21176949045.pdfIn PDF document text
    • http://batterseataxi.com/survey/userfiles/files/vebopamubapejawej.pdfIn PDF document text
    • http://dh-cell.com/ckfinder/userfiles/files/dozizusevisenebof.pdfIn PDF document text
    • https://lazerom.pro/media/file/41608200740.pdfIn PDF document text
    • https://unitytradefze.com/ckfinder/userfiles/files/pubesujipuvok.pdfIn PDF document text
    • http://tantusmarina.com/UserFiles/file/58099848884.pdfIn PDF document text
    • http://www.rodnolespropertymanagement.com/siteuploads/editorimg/file/kujadodewesuzonugel.pdfIn PDF document text
    • http://sushiloverca.com/uploads/files/xalelota.pdfIn PDF document text
    • http://gorsilawfirm.com/userfiles/file/wubegamobozedi.pdfIn PDF document text
    • https://reclamesticker.nl/images/uploads/file/In PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/5a63efb98adb04252bcb31676e13e561/63790948611.pdfIn PDF document text
    • http://xn--sanitrprofi-p8a.ch/fckeditor/editor/images/file/pugiwinibovim.pdfIn PDF document text
    • https://trompis-tondschungel.de/userfiles/file/lowuzojereraga.pdfIn PDF document text
    • http://www.bash.cl/media/file/6599283708.pdfIn PDF document text
    • http://chongthamnguoc.vn/img/files/20302589002.pdfIn PDF document text
    • https://ilonew.tasksplan.com/userfiles/files/fazewidogomivapegew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=boo+radley+saves+jem+and+scoutPDF 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_off0000bae5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAE5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d2fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2FC 10904 bytes
SHA-256: cc157ba341828d5e84316fb628616ce43e06720a67a83b8ca8575e70b43927f1
font_02_sfnt_off0000ec53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC53 18832 bytes
SHA-256: 0d948d19af41a446166b9ae43c477a6945f3acbd4200e11622192885488df1b7

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