Malicious PDF — malware analysis report

Static analysis result for SHA-256 bad0287690c11e2e…

MALICIOUS

PDF

78.7 KB Created: 2021-08-18 13:57:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: bece15d4164e818a6ce62f76fb74339c SHA-1: e7614ff7b0cd41288b68b26397f8c88a533184c3 SHA-256: bad0287690c11e2e78c9f05c756b975b5a7a546b0b65067842b5cea8e5b7cafe
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to disposable hosting domains and are structured as link farms, suggesting an attempt to lure users to malicious sites. The presence of these link farms and the overall structure indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 http://starkhigh1972.com/clients/d/dd/dd83d6d7846a033806cdb512e10d7d7c/File/19415670947.pdf In PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160701c12d7064---raxipafelikovutim.pdfIn PDF document text
    • http://fzsvybbs.at/userfiles/file/xewozeziseguli.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/71e0a4becfd8682b095f4758540f1fd3/revezago.pdfIn PDF document text
    • https://abicecream.ru/ckfinder/userfiles/files/juzurijivesix.pdfIn PDF document text
    • https://bandai-k.com/userfiles/file/fejukamajaluretu.pdfIn PDF document text
    • https://akanaymatbaa.com/calisma2/files/uploads/11748862534.pdfIn PDF document text
    • https://avela.md/userfiles/file/94500258257.pdfIn PDF document text
    • http://winfielddeli.com/ckfinder/userfiles/files/53940802917.pdfIn PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/jugutomif.pdfIn PDF document text
    • http://cancercareresearch.com/userfiles/file/rifaxixomezemanabevol.pdfIn PDF document text
    • https://xlspandoek.nl/userfiles/file/moxewaxofatabopozewovutut.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/snde7bttk3qru6u5rurnu3nb5q/garelenazaxukikaf.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/sofasovud.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/8f7c48f0018b1264c9b4043e80d8d7ff/xaxugodukibogini.pdfIn PDF document text
    • https://ekransamara.ru/files/39088733805.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071f66607ba2---68392721275.pdfIn PDF document text
    • https://abyway.lv/images/ck_images/files/37077158007.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a05a8a5a2cb---wapawufatazen.pdfIn PDF document text
    • http://familiegravesen.dk/ckfinder/userfiles/files/jikamej.pdfIn PDF document text
    • https://ostrichpharmaceuticals.com/userfiles/file/jikuvu.pdfIn PDF document text
    • https://www.autopsrus.com/ckfinder/userfiles/files/nofopiresalolixuta.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=10.s%C4%B1n%C4%B1f+biyoloji+ders+notlar%C4%B1+kal%C4%B1t%C4%B1m+pdfPDF 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_off0000cac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAC3 11324 bytes
SHA-256: d2fd8943a14b55f518625748d7de30434c271d439e102666f327861fa6f165db
font_01_sfnt_off0000e513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE513 18380 bytes
SHA-256: f560997474a54e5022a6c97c4098f0927712434fa1c87496b7ee58176025c32d
font_02_sfnt_off00011248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11248 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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