Malicious PDF — malware analysis report

Static analysis result for SHA-256 33a5ad9a53af98d6…

MALICIOUS

PDF

88.6 KB Created: 2021-09-08 21:58:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0f7c60c906f410fc48b3ce1a4c23b3d9 SHA-1: c10a12bc062f62dbeed8017c9624dc07151fc06a SHA-256: 33a5ad9a53af98d6f6592905e0b68d796aa8bf3899a1ddbf70315fc86a6963b5
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and multiple links to external resources, many of which are hosted on compromised CMS uploads or disposable domains. The heuristic PDF_RANDOM_URL_LINK and PDF_SEO_DISPOSABLE_LINK_FARM indicate a strong likelihood of this document being part of a phishing or malware distribution campaign. The embedded JavaScript likely facilitates the redirection or download of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://wellogo.in/userfiles/file///64814952852.pdf In PDF document text
    • http://www.tamtrebinhminh.com/public/files/14540716766.pdfIn PDF document text
    • https://mobilpetrol.olajpark.hu/files/files/pulifawuvisu.pdfIn PDF document text
    • https://www.winsum.frl/ckfinder/userfiles/files/tonewuleba.pdfIn PDF document text
    • https://renfrewareahealthvillage.ca/ckfinder/userfiles/files/tulerajiviluzuxada.pdfIn PDF document text
    • http://geojeoceanhotel.com/userfiles/file/20210907084959.pdfIn PDF document text
    • http://ros.by/ckfinder/userfiles/files/taxobuvarekako.pdfIn PDF document text
    • http://camel-republic.com/media/userfiles/files/sagobije.pdfIn PDF document text
    • http://parkingparts.com/Upfiles/file/vigujupogemavekeguvenaw.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/63cd4021484bae81de8e4f7ed1a39e18/bumusozumugis.pdfIn PDF document text
    • http://eraldocomo.it/userfiles/files/kugorubow.pdfIn PDF document text
    • http://letsbelegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/15313284977.pdfIn PDF document text
    • http://silarperu.com/UserFiles/file/dipivoz.pdfIn PDF document text
    • http://tetobox-budapest.hu/uploads/files/10159949717.pdfIn PDF document text
    • https://catequesisnavarra.org/guiarte_userfiles/files/dibijexewinaj.pdfIn PDF document text
    • https://elminhaj.org/userfiles/file/76624846973.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/k3h3s9p5s27u4au87c5hbmiu80/zubokuroxuludakax.pdfIn PDF document text
    • http://samnakthodrahassob.com/userfiles/file/74781625445.pdfIn PDF document text
    • http://mayinluatudong.com/uploads/userfiles/file/9587228817.pdfIn PDF document text
    • http://phongthuyphatloc.com/luutru/files/rowobejanun.pdfIn PDF document text
    • http://revistaspontan.ro/assets/ckfinder/core/connector/php/uploads/files/29322524268.pdfIn PDF document text
    • http://carshopm.com/js/upload/files/nanevebudarujo.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132f05b1fd83---13359919485.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/a1ed4b4415955a001eec57b5415f2c6d/sakin.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=jean+baudrillard+america+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD7E 18224 bytes
SHA-256: 878140b59c64a875c240d05a6550bcd39de94bf29feae1361d55f700afddf708
font_01_sfnt_off00010d48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D48 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012559.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12559 16448 bytes
SHA-256: 0e4cde3d5bdd5452960de995a4807c8da4ec665155a9812e2f8e54e6c49b7878
font_03_sfnt_off00013c33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C33 10628 bytes
SHA-256: b0cc3bb6477db1d9e3161bb5af3d4aca6d5c5ffc0f9861b27e024d25c8a25267

Open this report in the interactive analyzer, or submit your own file for analysis.