Malicious PDF — malware analysis report

Static analysis result for SHA-256 56440b87e745e487…

MALICIOUS

PDF

107.8 KB Created: 2021-05-27 16:08:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 4265466677a0b8a52a8b307864b4baac SHA-1: 04759679b617811795a6ad6138b0927028ec257c SHA-256: 56440b87e745e4870940a47d919ac86853a313d518cca3762a5d2bb25d1f0764
154 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and is flagged by ClamAV as 'Pdf.Phishing.Trojan'. The document body suggests a lure related to a specific search query, indicating a phishing or malicious content distribution attempt. The presence of multiple links to compromised CMS upload storage further supports this. No scripts were extracted, but the overall structure and heuristics point to a malicious document designed to trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7937

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 https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/g87sj6eh7vu2op96fr4jf0b4e1/10748864829.pdf In PDF document text
    • https://acrgroup.nl/userfiles/file/22311201509.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/c3846a0f6f69a138209a9265b4e0d113/jinovebizawifazobajojil.pdfIn PDF document text
    • http://monkey-do.net/userfiles/file/63686603763.pdfIn PDF document text
    • http://webursitet.org/Files/file/28844566998.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160942cba658ad---81455547311.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/1539701843.pdfIn PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/0d1635d45de8989637931cbffb5f150a/15130977003.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/69ae7fb45109485de99bfd366bc8e170/21273939237.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/0e2a64c0aa22dae821461bc8080739a5/demegonopejefuwapu.pdfIn PDF document text
    • https://nothingbutsafetyglasses.com/userfiles/file/zuvokutujufegazilofud.pdfIn PDF document text
    • http://hanarotalk.com/userfiles/file/%5C/nekejawifaxes.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607393bc4c23e---44366489509.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/rqg39fel1935fekd4e347f1fet/kugakepub.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/e716c544260d477575696f303b7153b8/majomavonebobajef.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/c88fe451138fe8b6e4359c760a62c977/xopuwakumexuregabisodeset.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/160779c528e47e---xopenurukakamoledumaravuj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=lalitha+sahasranamam+telugu+pdf+vaidika+vignanamPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000197b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x197B0 5520 bytes
SHA-256: ff3a257c75c0b6ebe21a8f4874846037cdf072839811e6746523674689b5673e

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