Malicious PDF — malware analysis report

Static analysis result for SHA-256 710322bbda7e553e…

MALICIOUS

PDF

97.5 KB Created: 2021-09-02 01:20:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2deaa93f96223ece1344bfae3f578044 SHA-1: feacb4f7a687bb8fb137ec8bbb04cdf17000a92c SHA-256: 710322bbda7e553e0237f4cecad88b2fda057b6264b6dc4a8d1d06909dfffb44
156 Risk Score

Malware Insights

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

The PDF document contains a link farm pointing to multiple URLs hosted on compromised WordPress sites, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The document's structure and embedded links are consistent with a phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b27af3f54---8678008500.pdf In PDF document text
    • http://makinsushi.com/uploads/files/33865742908.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/a4eaa6050d308b94365cdb788510109d/tulilijoranuwiziz.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a644fc25fc0---70861368098.pdfIn PDF document text
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a52759dbbb---85678860131.pdfIn PDF document text
    • http://creatinglifeoptions.com/userfiles/files/kubadebux.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608133ebad637---zijubezibaveraroxalewa.pdfIn PDF document text
    • http://abwlargo.com/uploads/files/33323052343.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160703bbe9c2ab---56546055798.pdfIn PDF document text
    • http://ebslang.net/_UploadFile/Images/file/60638066253.pdfIn PDF document text
    • http://bigxra.com/uploadfile/file/2021051003314873499.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/zakumuwomidilumatovevom.pdfIn PDF document text
    • https://prospr.fr/ckfinder/userfiles/files/ketagotexi.pdfIn PDF document text
    • http://akbarestate.com/survey/userfiles/files/96723920552.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/16098d469e3b5e---bepipotinumavilofipowova.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b01354c2631---93171274669.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/6581g8h9e09grc6kgk52fmdado/lenanidak.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a2bbb555aeb---tejoferonorowonifovasaziz.pdfIn PDF document text
    • http://ambulatorioveterinariomariani.it/userfiles/files/38862976604.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/d8b2758ad68ea41e0c2f9c1f7bc483b1/wixozoto.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16099ccbbd784e---17584887353.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089cf25ef682---xopilebofev.pdfIn PDF document text
    • http://location-appartement-venise.com/italie_documents/files/89075350375.pdfIn PDF document text
    • http://workontext.ru/media/file/60649215257.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=the+planets+biggest+to+smallestPDF 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_off000116c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012edb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EDB 18816 bytes
SHA-256: f1932440002d29e2d84ba9bd0984aad518bcf4c2708cfe58ac89858204dd3e19
font_02_sfnt_off00015f5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F5C 10704 bytes
SHA-256: 635b29cc221c56cb80446b44dafc8914857314a5ae4371617fe6a002d6a0f1fc

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