Malicious PDF — malware analysis report

Static analysis result for SHA-256 0321deec92eab39e…

MALICIOUS

PDF

79.3 KB Created: 2021-09-06 11:38:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 180c9ab0be49724dbad998e78384177b SHA-1: 04449afa5d747d9d8e0181b8fb8ee8a32df861a3 SHA-256: 0321deec92eab39ed8ec5db71a7ff1a0bd19291c564d1f3746c79a6b563fa3e9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm directing users to multiple external URLs, with several hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure and embedded URLs suggest an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://alpha-th.com/userfiles/file/fewutufajolamuzeneganu.pdf In PDF document text
    • http://coffee33.ru/archive/file/62824370555.pdfIn PDF document text
    • http://lasfyy.com/uploadfile/file/20210606194414879.pdfIn PDF document text
    • https://soudurelauziere.ca/upload/editor/file/85369735764.pdfIn PDF document text
    • http://goodslib.com/userfiles/files/gifuwu.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/0615b577e14604923dc79119e4ad080e/92307821442.pdfIn PDF document text
    • http://skisun.it/userfiles/files/36931567866.pdfIn PDF document text
    • http://ateliergermain.net/sites/default/files/file/87360387020.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/d67f33a780ecebd8943eb60ad52681b9/dulamolituxozovelinenod.pdfIn PDF document text
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/ogltgpjtope75960idl3npa5k1/dejutejemaroxigoriximofaf.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac75975d092---kawuduzu.pdfIn PDF document text
    • https://maxflowfans.com/userfiles/file/kilagizavinovaruluvajan.pdfIn PDF document text
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/58e859480de8b51bd514997e44bd39b1/fejuxokovoxonigoraji.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16073a0184730d---50613201422.pdfIn PDF document text
    • http://autodilykanka.cz/cmsimple/images/file/18796917198.pdfIn PDF document text
    • http://doctour.hu/uploads/ckfinder/userfiles/files/71176777643.pdfIn PDF document text
    • http://miraesusan.com/ckupload/files/79664008320.pdfIn PDF document text
    • http://faradbox.pl/files/file/84305874565.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/0d26e2d106a513572d3666efd6ba1389/metesidikujokelesu.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160704094da097---nufaxewuziwegugajewutu.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/ug6pm5p79dh8tnosv4sqba1p12/87720416396.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ffaa83854---41071436079.pdfIn PDF document text
    • http://arslanemlak.com/E/file/75158942860.pdfIn PDF document text
    • http://nuocmambason.com/upload/fckimagesfile/968999278f7baf50a057dfdc7f3755e4.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=espressor+manual+gaggia+viva+stylePDF 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_off0000cc6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC6B 10860 bytes
SHA-256: b79c3e17f527a40c3aa237baa13c882fdab7b202a5545f276190d90b90a7d81b
font_01_sfnt_off0000e57e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE57E 19080 bytes
SHA-256: c107c962596d1bc3909e077de2061afbe04ded33248f24e8bb1e5b11fecfa391
font_02_sfnt_off00011708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11708 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1