Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c75267895a85b63…

MALICIOUS

PDF

78.5 KB Created: 2021-06-19 10:46:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 172abd8c4bdbd8ce2d64e9db10899129 SHA-1: a063a5fe4ef51a7c501bc5535c6a5ea939c7533d SHA-256: 2c75267895a85b63480ee11a6701947b12788a27bd3cb409e97fa83c476ce08a
196 Risk Score

Malware Insights

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

This PDF file exhibits malicious characteristics, including links to compromised WordPress upload storage and a link farm on disposable hosting, suggesting an attempt to distribute further malicious content. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were directly extracted, the PDF structure and URL patterns indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607da17401362---11356710932.pdf In PDF document text
    • http://esthebel.de/userfiles/file/mopuz.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/28f7023483eb07bf30c6e6c42b96802a/xosixurejojanox.pdfIn PDF document text
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/1852221629.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/43d5d4c12f6c26eb0889b83d92521829/mosikona.pdfIn PDF document text
    • http://christschoolblr.in/userfiles/file/nokasazemezuguxem.pdfIn PDF document text
    • http://market-oborudovanie.ru/upload/file/34303893051.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607efbc9043ab---88846009369.pdfIn PDF document text
    • http://htwy.com/upload/file/7893264167.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3c1a7d8d9---52226265298.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/24266339429.pdfIn PDF document text
    • http://ambulatorioveterinarioscapindandrea.it/userfiles/files/99793858248.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/u7dsal6q4tbj0jeni5e253btp0/42588264686.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/33e3dfccdea8435e6082ca07a077d09b/xegido.pdfIn PDF document text
    • http://zavalinka.by/var/upload/file/94922357581.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160851a2eb24ef---kozawev.pdfIn PDF document text
    • http://eksan-ltd.com/userfiles/file/38837743153.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/ngfLrbzwjls/uplcv?utm_term=star+wars+galaxies+emulator+downloadPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e63d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63D 5408 bytes
SHA-256: 3311f967fee4eb60fde4dca20716549143bdfcfc5614e82bcf772c7f32e1830b
font_01_sfnt_off0000f89d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF89D 16864 bytes
SHA-256: 1694d395426ab29a76d783c9eaf049ca8a68c10312827ce202b77b93ff8a14b1

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