Malicious PDF — malware analysis report

Static analysis result for SHA-256 00e22fda4c4007c2…

MALICIOUS

PDF

72.9 KB Created: 2021-09-18 06:25:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1e70226a9a605ce71c9e0372e37ae13b SHA-1: a8db6b6afcd0401c6c0f3f8876a6b378285407bb SHA-256: 00e22fda4c4007c2dff75cf50d09de323b43e288fa4f4e8088810709cd551178
156 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to numerous external URLs, many hosted on compromised or disposable domains. This pattern is commonly used for phishing or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pixomot.ru/uplcv?utm_term=mirror+smartphone+screen+to+pc PDF link annotation
    • http://abwingscolley.com/uploads/files/80781827706.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/3fec5b6535bbb076a5a2cee261c45679/gebojefak.pdfIn PDF document text
    • http://onnetsolution.in/userfiles/file/97331768466.pdfIn PDF document text
    • http://leebyenghun.com/new/upload/board/files/62679930307.pdfIn PDF document text
    • https://maggies-handmade.com/UserFiles/files/74288402008.pdfIn PDF document text
    • http://triple-a.co.th/ckfinder/userfiles/files/rodorimuduzoluvulujit.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613fde88bd0d3---koxokepuxijenawuwer.pdfIn PDF document text
    • http://mgtuae.com/uploads/file/67504647707.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613ef8ff1d119---5475092846.pdfIn PDF document text
    • http://indigobaby.eu/upload/files/basuwo.pdfIn PDF document text
    • https://www.marjojaspers.nl/ckfinder/userfiles/files/fexofarediwikatex.pdfIn PDF document text
    • http://baocaosudanang24h.com/uploads/image/files/44901371114.pdfIn PDF document text
    • http://shortguycentral.com/ck_uploads/files/90337594139.pdfIn PDF document text
    • https://ezsprinting.com/userfiles/file/6480100944.pdfIn PDF document text
    • http://fanghsin.com/uploads/files/202109161006492274.pdfIn PDF document text
    • https://ukmalayalamnews.com/userfiles/file/juxanedeguxasibowizu.pdfIn PDF document text
    • http://gavinlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/60768675042.pdfIn PDF document text
    • http://satyavnetworks.com/fck_upload_images/file/kijit.pdfIn PDF document text
    • http://littlepearlbooks.in/data/eimages/file/44561061075.pdfIn PDF document text
    • http://career-id.org/ckfinder/userfiles/files/mural.pdfIn PDF document text
    • http://www.hausbaumesse.at/ckfinder/userfiles/files/33850977784.pdfIn PDF document text
    • http://tumwebthailand.com/ckfinder/userfiles/files/16835268582.pdfIn PDF document text
    • http://yeongwonenc.com/userfiles/file/72243780441.pdfIn PDF document text
    • http://pcwenhua.com/uploadimg/file/16311589811364608451.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613d410d5f150---puwinemojenatugonubawepu.pdfIn 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://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_off0000babc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBABC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d2ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2CE 16656 bytes
SHA-256: e6e103d0597d72ad3608968bbe1aa8161dddfc8f7a8185d1c391dbe3557e931e
font_02_sfnt_off0000fd7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7C 10584 bytes
SHA-256: 58b977195b9da27ceedd389b572b2dbe7d6b940f2dc0932d6d55abf2f7c0f69e

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