Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d10e23b9794cc62…

MALICIOUS

PDF

84.5 KB Created: 2021-06-19 21:00:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: a89a2a197c6f94a9261ee5f37b71c010 SHA-1: f08beb944c4e17943e7b6882b68bdb62730119e2 SHA-256: 8d10e23b9794cc62a2bba42708de4d894233fa0aad42fd795cf1d1011a028325
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous links, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The ClamAV detection and ML classifier further support its malicious nature. No scripts were extracted, but the embedded URLs and link farm structure indicate a clear intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5395

Heuristics 5

  • 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
  • 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://nomylo.ru/uplcv?utm_term=kgf+full+movie+tamil+download+hd+tamilrockers PDF link annotation
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/94f43d7002bebad49055a820507dcdcd/53339921193.pdfIn PDF document text
    • http://healingtown.org/userData/board/file/jubiseragukof.pdfIn PDF document text
    • http://stlnsk.ru/uploads/file/tupiti.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160973b220815f---puweniledoxakesavikazufo.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce18497ef1---zunuvedebenajul.pdfIn PDF document text
    • https://bladmedyczny24.pl/wp-content/plugins/super-forms/uploads/php/files/ebc19f5a57bb878090dfcb7a81fd30a9/luzafidonoburavipola.pdfIn PDF document text
    • http://dzbnf.com/upload/file/%5C/98190247122.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/m5e1u6l6feodcl4p5s77d2cri7/86975708430.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b86f25ad866---bujubemo.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/0643491711f617e2da79bbec42acad35/39066606418.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abc137a8544---somukuj.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/7eb338f3a3f51b545a1ce30ca2b5051c/kedobumesoxaseze.pdfIn PDF document text
    • https://peilimineko.com/userfiles/file/51958330683.pdfIn PDF document text
    • http://unipsyclinic.com/userfiles/file/20210512045715.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE796 5620 bytes
SHA-256: 0f036fa7c0c91f98565ee83c425e081ed9f03ee99b38b9ca78a037158bf230c8
font_01_sfnt_off0000faa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA0 3720 bytes
SHA-256: b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b
font_02_sfnt_off000105fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105FB 1936 bytes
SHA-256: 7420db9ec41012b263dff8e0d039d2a895961a6b4c1647eabbcd20f441fad98a
font_03_sfnt_off00010f42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F42 11356 bytes
SHA-256: 8c04848ea5e827c31355059023e152069626eb5f9bad7b5fa158309955bc5933
font_04_sfnt_off00013641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13641 16164 bytes
SHA-256: c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e

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