Malicious PDF — malware analysis report

Static analysis result for SHA-256 d60e18f110db8f6a…

MALICIOUS

PDF

78.3 KB Created: 2021-06-25 13:17:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 17a19dccb02e04f2357c509f1b2df481 SHA-1: fb23057e910025afaa16ff5df626dcc793680711 SHA-256: d60e18f110db8f6a20962c09972657fabbdc4c1c25b0caff81322250a082b854
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate an attempt to trick users into visiting these sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/e8127ba45a3715241c77ffc15e18e4fc/tusaximodofupezorotofavut.pdf In PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4dc2e77e46---12550877526.pdfIn PDF document text
    • http://blatt-gruen.ch/files/dovuvo.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/63783be30d1fcf10dca9c7378a7ebc51/35873594371.pdfIn PDF document text
    • http://maekalocal.com/Maeka/UserFiles/File/59325271775.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/8ablggr9j9a4tq6b5egg8c62sg/kuxeduponeba.pdfIn PDF document text
    • http://nhadatv.com/webroot/img/files/zopufuzogalaku.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/8f3qqr8oaekd0vv9op610756mk/84468628954.pdfIn PDF document text
    • https://angelsstaff.com/uploads/file/mexefekutujol.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4099324da7---85239353781.pdfIn PDF document text
    • http://pescepiana.eu/userfiles/files/44415869872.pdfIn PDF document text
    • https://edcasys.com/ci/userfiles/files/68452179014.pdfIn PDF document text
    • https://dailyiat.com/html_upload/file/53565466476.pdfIn PDF document text
    • http://ash-graphy.com/userfiles/file/bivefesezosodowuvagus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=convert+arabic+pdf+to+word+free+onlinePDF 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_off0000cf3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF3C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE753 10768 bytes
SHA-256: a99a90da84b0194a71a12abad78e479d08e18115c88b0954f6e407ba812b5812
font_02_sfnt_off00010012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10012 17132 bytes
SHA-256: 58fccf6e99bf0dbdfe2c34deac2257640850f51ee9e11a6dad684d5aaf0ca709

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