Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0734516f9072e06…

MALICIOUS

PDF

83.3 KB Created: 2021-08-20 17:57:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d3403401159cede627342e29328f14a9 SHA-1: 8912fd1a2fa42132fb4ed65dd4e8455541aee890 SHA-256: b0734516f9072e0669552d8cf626e7c546149f691d01e5700ca97fc762711102
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS platforms. The primary goal appears to be to lead users to potentially harmful content or phishing sites through these embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://anshan56.cn/userfiles/file/16265853781560958535.pdf In PDF document text
    • https://ssmavidiyar.com/public/content-images/files/gubakidesugokif.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607031d2d8769---86923902360.pdfIn PDF document text
    • http://hanhthien.net/uploads/file/56882538774.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c69f64728b8---92193724857.pdfIn PDF document text
    • http://bona-agra.pl/Upload/file/sajubapopu.pdfIn PDF document text
    • http://paroissedementon.fr/upload/files/79993874982.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/0qkjfem6oe81qfmo44vpmbkqqo/95737468452.pdfIn PDF document text
    • https://webtechnocrats.com/upload/file/kozavamegetifuvegiviva.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/a65c3bf7b6a5e5b377ed47162867b3d3/83392042849.pdfIn PDF document text
    • http://bkbflooringusa.com/userfile/abbey/file/93293482045.pdfIn PDF document text
    • http://bernardthevenet.fr/ckfinder/userfiles/files/41291280726.pdfIn PDF document text
    • https://childconcern.in/trila/userfiles/file/laviri.pdfIn PDF document text
    • http://thesprotia.gr/uploads/file/demolixu.pdfIn PDF document text
    • https://longhoang.vn/upload/files/velopel.pdfIn PDF document text
    • http://medicare-darmstadt.de/bilder/UserImages/file/lazakeforipusajumagejadut.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160ad73e60f39c---80964508337.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606efcce78d13---71961351893.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/8619caa6692ec4a6943f962b70f30ef9/92426304409.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/l7hrnnqr2jol7jm5jmiot4k7kh/winesagulanamekatu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=how+to+write+a+news+report+for+studentsPDF 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_off0000e2a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A0 10624 bytes
SHA-256: e29b0ec277944f8c576ae5c7b92d88e94315ba2f79fc5fdc073c8d2c0a834209
font_01_sfnt_off0000fb0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0E 16884 bytes
SHA-256: e5f0586140681fe349d65c36c63baf6f0e2d3a3f4b09d78d7c3b36d6f42f0583
font_02_sfnt_off00012693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12693 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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