Malicious PDF — malware analysis report

Static analysis result for SHA-256 04341fda19a0b679…

MALICIOUS

PDF

85.2 KB Created: 2021-07-19 22:55:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 7a4cbf96f672beb13611466f5bbe86ba SHA-1: dd88d7c72b98b545109e6de41085bc114ba7ba35 SHA-256: 04341fda19a0b679c0feeade2ae81956c4cd28d2580a2f64544a2d3e3d671217
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated, preventing a clear understanding of its direct lure, but the overall structure and heuristic firings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • 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
  • 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://anatolianlgs.com/userfiles/file/43339632465.pdf In PDF document text
    • http://leaguengn.com/userfiles/file///vijarewamevedub.pdfIn PDF document text
    • http://duda-tech.pl/dudatech/upload/file/vagusefujixakoxo.pdfIn PDF document text
    • https://binarbaid.com/public_html/userfiles/file/fatug.pdfIn PDF document text
    • http://thienminhgroup.com/uploads/userfiles/file/50458889752.pdfIn PDF document text
    • https://angkagenap.com/contents//files/vafuz.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/bujexutipategiroriwirepa.pdfIn PDF document text
    • http://qhs1978.com/clients/d/dd/dd8db5a278a7ad55a2ada34b8e38ebcc/File/sexereferutakukobemusofi.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/3f01bf73872924bc0141f7b7d0dcadd1/9875364014.pdfIn PDF document text
    • http://lahma.pl/_u/userfiles/file/82492906654.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/b1b83b86a6fd9da7053b7393c2eef158/39825980426.pdfIn PDF document text
    • https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/d49a9508282b651e8882994c39892f67/vunutu.pdfIn PDF document text
    • https://deniz-sogutma.org/img/userfiles/file/49090901544.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1606d91889b698---fuvajavopisuxirolol.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/2fe8a3aab631343ae4da0335e696381d/73418554519.pdfIn PDF document text
    • https://brs.jo/userfiles/files/86332319128.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5728f2333---93057003070.pdfIn PDF document text
    • http://vladjurnalist.ru/archive/file/81675957203.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c3969877c24---90815575344.pdfIn PDF document text
    • http://virtualcharityevents.com/vce_cake/files/files/19775468978.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/16077f16f4ac69---3933765580.pdfIn PDF document text
    • http://aisef.org/uploads/userfiles/file/file/39338906845.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=bible+scriptures+about+foodPDF 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_off0000e9fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10214 10800 bytes
SHA-256: 557874e05aa2bc3103c2f6911faa0e49165599cbde6c404c842cffadfbaab813
font_02_sfnt_off00011ae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE1 16720 bytes
SHA-256: fd52d3f79207d3e8889829b0e2fb9c61ebe79faa3eed2c79a1ae1f3bfae2c73c

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