Malicious PDF — malware analysis report

Static analysis result for SHA-256 800c0daa2dd30eb0…

MALICIOUS

PDF

81.3 KB Created: 2021-09-02 21:25:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 11db2864d260815740b238c605abd495 SHA-1: 4146a10660943e9f80a2e81bdd90bc4435d4da7a SHA-256: 800c0daa2dd30eb03ba60193b105258494c3314f6cc35199942fbb96173d5a92
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://zmiz.hr/userfiles/file/rirenikewuwa.pdf In PDF document text
    • http://insidethedigitaltrend.biz/userfiles/file/36818164310.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/967fde63de90dcbaac872f1f70e67cc3/fegevavudubal.pdfIn PDF document text
    • https://malayalamfoundation.org/admin/my_files/file/kazigiwarajibizitelab.pdfIn PDF document text
    • http://xn--80aafbanafwvcftiqfecrg2a.xn--p1ai/pict/file/kisugaduwexuxumobiwelukab.pdfIn PDF document text
    • http://webbuilders.com/files/file/32433815862.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/3a21d0d1e51478945d7c9b8017a710d5/zopijaguson.pdfIn PDF document text
    • https://arab-hams.com/Ups/files/89881458209.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/ff6167e73bd9e3c63c54c0620ade8ba8/5769508072.pdfIn PDF document text
    • https://mokhalasati.com/userfiles/files/12247672890.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/161239c30ad787---zopogusiboberebudesirimep.pdfIn PDF document text
    • https://hunghiephuylog.com/upload/files/jozega.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/05f658a106b506b93500dcbcd49aa1f2/32026504365.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075c25d0f4af---lisodakezijibop.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/zimunonoma.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/o4vaskb0f3pui2vprjluc4c7s1/77169899314.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160a209861b759---xuxifoxafiwobi.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160ced8c912e08---96922610511.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/f3c3be275065640fad28e866900d3002/2647746599.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/gunatatatikasopo.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/a34fc06cdb36adcfa9211b764ca3e473/vojaji.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608f5c70f367d---ronuzuperitadepanaj.pdfIn PDF document text
    • http://obrienbuilders.com/userfiles/file/19143815046.pdfIn PDF document text
    • http://hytechplus.com/userfiles/file/fenovidijosanuzu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=yakety+sax+alto+sax+sheet+music+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A0 17580 bytes
SHA-256: fb5acf4db1c06de15ecc82e82283d969a3cb8e4a7c90bac5f6232c6f449bd405
font_01_sfnt_off0001052f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1052F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D46 11072 bytes
SHA-256: 29765f6cf112c54f40f42144eea1bf95c87d57dbed1938a6531191d2e3708f8f

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