Malicious PDF — malware analysis report

Static analysis result for SHA-256 22724944c90b409b…

MALICIOUS

PDF

87.9 KB Created: 2021-08-05 15:20:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 50e9e8053228def186231657d9219a8e SHA-1: d3e822d734ceba5ca86c927fd93877e1f2aee212 SHA-256: 22724944c90b409bcdf43cbec8e9007987b70f0874a4177f653b2662ae6ca47e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, many pointing to compromised CMS upload directories, indicating a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and link farm heuristics point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8603

Heuristics 5

  • 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
  • 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://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076358a72e69---xemaxi.pdf In PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081171996764---gulikokaxun.pdfIn PDF document text
    • http://svb-volleyball.de/userfiles/file/61158661718.pdfIn PDF document text
    • http://aplus.to/userfiles/file/gipiw.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/33kjlgi4tm25s7fg4j6s53mc6k/fixedonedizexafijoteko.pdfIn PDF document text
    • https://syntellect.ru/Repository/file/gorobir.pdfIn PDF document text
    • http://biotledlight.com/userfiles/file///zudugar.pdfIn PDF document text
    • https://caribemed.com/userfiles/file/mudiloxuxetozonukebugewo.pdfIn PDF document text
    • http://vizit-k.net/uploads/editor/files/wosixajap.pdfIn PDF document text
    • http://s-privod.ru/userfiles/file/83204233595.pdfIn PDF document text
    • http://rld-carbon.ru/file/badexumibozufuvudunu.pdfIn PDF document text
    • https://cecprint.com/images/file/51272549803.pdfIn PDF document text
    • http://dhf-china.com/d/files/tekojebiwa.pdfIn PDF document text
    • http://bkmarine.net/ckfinder/userfiles/files/1628132608.pdfIn PDF document text
    • https://mfdesign.hu/files/file/55403942917.pdfIn PDF document text
    • https://prokoncept.hu/admin/blogfck/image/file/newoluxapalawikaduw.pdfIn PDF document text
    • http://ypperfect.com/ckfinder/userfiles/files/nulopominukik.pdfIn PDF document text
    • https://inijariku.com/ckfinder/userfiles/files/51824504766.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608038a1a4288---muzafogaroturanovijanakur.pdfIn PDF document text
    • http://casier-a-bouteilles.com/file/54290159455.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210506195451_829366785.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/muweka.pdfIn PDF document text
    • http://emailreceptionist.net/userfiles/file/54384937779.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=contoh+soal+siklus+akuntansi+perusahaan+dagang+metode+perpetual+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011ea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EA2 16888 bytes
SHA-256: d085d68ed1513be5f21f8e6549d09bb012d8e0521dca1fd01bbae1f1c5853873
font_01_sfnt_off00014a87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A87 11168 bytes
SHA-256: f70b2dd02383d2230ad23a06d8f6ba18199021175d34209b5f9b9e6574323596

Open this report in the interactive analyzer, or submit your own file for analysis.