Malicious PDF — malware analysis report

Static analysis result for SHA-256 51cd2615c1f9682c…

MALICIOUS

PDF

90.2 KB Created: 2021-09-20 08:22:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3cbad031b02dad865a79c6f8005fdc4c SHA-1: 6bfcb604bf6064d0a1db0a6354347d7b361e9120 SHA-256: 51cd2615c1f9682c4bfeb165c9dc3bc1a06f8def6b3c6b9ae8dc60900fb3b54c
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://taperagi.com/contents/files/fiwerukufilek.pdf In PDF document text
    • http://yuanjen.com/ckfinder/userfiles/files/fudonarelo.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/002aa182dbc3eb4a149c473fb5be48c7/netegelunejazuvaraba.pdfIn PDF document text
    • http://miydz.com/mingyi/images/userfiles/file/lenifakuwajozaxogum.pdfIn PDF document text
    • http://xn----7sbezcba9a5aggb3j.xn--p1ai/ckfinder/userfiles/files/41413693134.pdfIn PDF document text
    • http://www.oe.com.tw/ezadmin/ckfinder/userfiles/files/jolas.pdfIn PDF document text
    • http://physocare.com/Images_upload/files/supifikedixefatar.pdfIn PDF document text
    • https://123natura.com/stockages/files/nezuja.pdfIn PDF document text
    • http://ldksolar-officialliquidation.com/userfiles/files/zibipavamafirojebawopo.pdfIn PDF document text
    • https://ruxthai.com/ckfinder/userfiles/files/4655075477.pdfIn PDF document text
    • http://puginternational.com/ckfinder/userfiles/files/20305858586.pdfIn PDF document text
    • http://otoozevran.com/resimler/files/86801567652.pdfIn PDF document text
    • http://nakamurasangyou.jp/app/webroot/uploads/files/53334861285.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/bijafeloxiwosaxifilunowaj.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161409bdcad69d---jikizemit.pdfIn PDF document text
    • https://mcq-exambd.bdbabymart.com/app/webroot/ckfinder/userfiles/files/82154718764.pdfIn PDF document text
    • https://zzhqhi.com/d/files/ginogiriwa.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/7e3899e36effd1edf187e643e6498aad/14975304242.pdfIn PDF document text
    • https://autopits-directo.migrupoq.com/ckfinder/userfiles/files/82533782077.pdfIn PDF document text
    • https://sgotomotiv.org/upload/files/23549177326.pdfIn PDF document text
    • http://suvagcentr.ru/userfiles/files/87668064413.pdfIn PDF document text
    • http://renknh.com/ckupload/files/70038533994.pdfIn PDF document text
    • http://dekogard.net/deko/veri/_files/rililivubixer.pdfIn PDF document text
    • https://zmiz.hr/userfiles/file/duribegasev.pdfIn PDF document text
    • http://beerskiboot.de/img/upload/file/mamifepozekemavegizivodoj.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16141389650a02---bigajipevufefilizavemomos.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=find+awesome+games+apkPDF 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_off0000fe98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE98 10644 bytes
SHA-256: 6f845a1067c14b1cf3ff4c9fbe1855b5614539234f70b73cbc3efa770bf595e5
font_01_sfnt_off000116bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ecf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ECF 17332 bytes
SHA-256: e736389f9c212175dc0834b81b16bd9775176ab7bb6414b3ded6a748cea092e9