Malicious PDF — malware analysis report

Static analysis result for SHA-256 30a6505e7a0e23ad…

MALICIOUS

PDF

83.2 KB Created: 2021-08-10 14:56:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 82f16ec5f36f6713946016969dd8dc0b SHA-1: df88645f2cca92b0cbb98431bf17256ad406a6d3 SHA-256: 30a6505e7a0e23adec392c3192ecd1de926d5e1540494878830d87522a859833
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9355

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://kimandyoo.com/userfiles/file/4139835712.pdf In PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/a473e712adcc25b69caf337cff4ba16a/katir.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/9e275761862ca4130e77d9d07c389a36/86219646061.pdfIn PDF document text
    • http://178.62.148.222:300/ckeditor/ckfinder/userfiles/files/buzusojomi.pdfPDF link annotation
    • http://www.horakgolf.cz/ckfinder/userfiles/files/29017158321.pdfIn PDF document text
    • https://2acontractor.it/images/file/53947211753.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079bfb9af25c---futelowizexekobiwuzogim.pdfIn PDF document text
    • http://co-wemart.com/careeruserfiles/file/kaxasud.pdfIn PDF document text
    • https://betenenergy.com/sites/default/files/file/fugefizixobevinefufana.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/347376a18ce91bf0d1ea4b52bba030b9/92273905637.pdfIn PDF document text
    • https://sce.tw/uploads/files/60d1dfd7554fb.pdfIn PDF document text
    • https://hanurichurch.org/ckfinder/userfiles/files/47749758236.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/3097af29dceee09b26eed6e476869772/wunifurumapud.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210721203429954.pdfIn PDF document text
    • http://andersonlawdecorah.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/2117575959.pdfIn PDF document text
    • http://eraldocomo.it/userfiles/files/74306455283.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/161001e46720b8---76292713876.pdfIn PDF document text
    • http://luberoff.com/userfiles/file/17382707859.pdfIn PDF document text
    • http://bjeclinic.com/ckfinder/userfiles/files/69589656729.pdfIn PDF document text
    • http://iknow.pl/files/file/xitigatobokovuvebisa.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160877bbe2431a---fosoxigivazaxevobikopo.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c8d2b74a1d---77128241876.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a78d69c0a73---goserik.pdfIn PDF document text
    • http://di-tech.kr/fckeditor/userfiles/file/gepujigumegadifawezaponas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+check+serial+number+of+hp+laptop+through+command+promptPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1F 11476 bytes
SHA-256: a214f8a356ed3bafdde46e03f994777ba485479bae2ff1cbeafec89d1cf7aa54
font_01_sfnt_off000109ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109AD 16744 bytes
SHA-256: 4350000bc7528cc1f4bfe02e105e1cf92ff1c960c008378128d18bcb1fcdb761
font_02_sfnt_off00013502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13502 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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