Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f46517a9cbe3062…

MALICIOUS

PDF

88.7 KB Created: 2021-08-16 12:14:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9c13dc2696d721c2fb8874073aaa3762 SHA-1: 10643382b5c7ff4b94f81ba3eb5536f787e7fffa SHA-256: 1f46517a9cbe306276ed60750f61d7c9d58797cae9e2402331faa6a5480e5ffc
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The document contains numerous external links, many pointing to domains associated with compromised WordPress installations or disposable hosting, suggesting it functions as a link farm. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://allytemp.ru/uplcv?utm_term=evaluation+cm2+aire+et+perimetre PDF link annotation
    • https://renetravel.ro/images/files/50096923165.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160845fdc70085---79271395111.pdfIn PDF document text
    • http://aktifimmo.lu/userfiles/files/18554306594.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/bbb64e1ce44938d23c0e7c6d4c1c516f/4333529576.pdfIn PDF document text
    • http://tlxzkj.com/uploads/file/11150428412.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160fdef1374d35---bomafusekusunuziwutara.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160709c424adb7---kebebizetenurumos.pdfIn PDF document text
    • https://pasarantogel.com/contents//files/zositaro.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/90270056623.pdfIn PDF document text
    • http://tsg-edinstvo.ru/userfiles/file/38718148994.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a85abbed9ae---27538468599.pdfIn PDF document text
    • http://moveworldtogether.com/datas/files/98171528927.pdfIn PDF document text
    • http://starke.ca/clients/84205/File/32091880094.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/pawaretuwaranexezereg.pdfIn PDF document text
    • https://unitjaya.com/contents//files/totalipiso.pdfIn PDF document text
    • http://lighthouse-connection.at/myPix/file/97102647486.pdfIn PDF document text
    • https://greenlakepaint.com/ckfinder/userfiles/files/90787576287.pdfIn PDF document text
    • http://backupcenters.com/userfiles/file/xifekiselopik.pdfIn PDF document text
    • http://arqing.es/ckfinder/userfiles/files/kizikomasigegixovarivufi.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608582a366615---5396138222.pdfIn PDF document text
    • http://knuhpharm.kr/userfiles/file/20210618015356.pdfIn PDF document text
    • http://peak-experience-europe.com/images/blog//file/54439552492.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2deeb0a5c---92114998360.pdfIn PDF document text
    • http://kimtuong.vn/isc/public/files/fckupload/file/1125501212.pdfIn PDF document text
    • http://aviatechinform.ru/sadm_files/kajojotikamananaxadozataf.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_off0000eebc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBC 19832 bytes
SHA-256: c776ddb37a578f66ab9acfc2a8abe3c512fb66425b1e0019709dbb453e956e65
font_01_sfnt_off00012158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12158 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001396f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1396F 10636 bytes
SHA-256: c604c38b17c51a065785b0104c832b741e5714148d531eddc7ac50c6c35488d3