Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c951e54100267e0…

MALICIOUS

PDF

88.6 KB Created: 2021-06-24 04:16:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: b26419f700b2a8e7cdfbc5fe2752305b SHA-1: ace4427962bdbe9cdf7a3bea4bf1239c517cd112 SHA-256: 0c951e54100267e0d58003bc31121597ffaa7949c17defc757f0193a0d97a229
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing campaigns that leverage fake content like movie lures to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 https://huntic.ru/uplcv?utm_term=monster+hunter+2020+watch+free PDF link annotation
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/9alb63rkpj0535ofvh1k8dg1j8/borumaresufev.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160773c2694d78---13559467636.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/32dc94dfdc201d498c60cb097be7094b/suzudovujevigax.pdfIn PDF document text
    • https://addsfly.com/userfiles/file/dulakevemibodakori.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file/%5C/52883499454.pdfIn PDF document text
    • http://pk.mo/userfiles/file/migisezotunudatijurez.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070a7b9122b3---kakenelatorafaxax.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c8767088b18---ribababisonu.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/836cku2v1qa49lvn3vgjt3spp3/musonokekoloduxo.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/44379e08b41013f5e74cffdd83ab262b/21949516449.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/847846dbd3b580fa0d93da51ff34e7d6/38854337695.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/65123340383.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/rpqrmu9tf4toq4uh3iud12mfu9/2693858129.pdfIn PDF document text
    • http://ypdtools.com/ckfinder/images_store/files/47751971963.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/72990907296.pdfIn PDF document text
    • http://3qlohas.com/CKEdit/upload/files/minafotesevuwenip.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C3 2988 bytes
SHA-256: 041eeefca3f75e8ecb5adfbd6a986841a6be4f48092ea62d8a22fe94c42dad9e
font_01_sfnt_off00010274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10274 5308 bytes
SHA-256: 6b7414d5157dc6c2c2487c4221ad2e44efb4f8070daab97b4332a5e57dd11e73
font_02_sfnt_off0001149b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1149B 12108 bytes
SHA-256: 3cb4fbd0c9091cd122a392c6da383c72426796acf407c3c2040d77fb1a91ba7b
font_03_sfnt_off00013d49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D49 16344 bytes
SHA-256: 2f0741b90c722a818c13272fb801b844da1051b4fa6eb166e2bf2b1ddc5a7175

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