Malicious PDF — malware analysis report

Static analysis result for SHA-256 2da5ebc1788e30bf…

MALICIOUS

PDF

87.6 KB Created: 2021-08-13 06:57:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e2ed47f70dbfc229da61d37fc0d2b8eb SHA-1: 2ea90f0022bd2e1eeb57c02bf838613fa1869eb8 SHA-256: 2da5ebc1788e30bf3e998fd9d996a182bd19b3c8eaa4be05e50ef9988e8ae137
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs pointing to compromised WordPress sites, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or delivering a secondary payload. The presence of multiple links on disposable or compromised hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b14c8570c73---5468589091.pdf In PDF document text
    • http://autowagon.it/userfiles/files/zavinasuf.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607590a94bf09---waxapexumexasedizeretuxu.pdfIn PDF document text
    • http://suacona.com/clients/16856/File/63031041507.pdfIn PDF document text
    • https://condominiobrisasdelnorte.com/userfiles/file/70986348894.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1610a89a9d8137---94542596729.pdfIn PDF document text
    • http://okwmd.com/upload/fckeditor/file/ladarir.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/6e1e4ccd34c5867bc6f0a85fe24075df/48075158799.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b0007058acf---jusagokowamirunikuget.pdfIn PDF document text
    • http://inglewoodreunion.com/clients/68690/File/92106157238.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/tilifinuxedisojumexatezaz.pdfIn PDF document text
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/83762682662.pdfIn PDF document text
    • http://hkalc.com/userfiles/65532085665.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/706p13a1antjf5h5jiu7ab1lh3/76727993837.pdfIn PDF document text
    • http://szakkepzosiklos.hu/upload/file/mogudizifeki.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/jomipuvuziwikikebiboje.pdfIn PDF document text
    • http://zbraneklapka.cz/ckfinder/userfiles/files/17452100250.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6df088329e---babuzipeferobilima.pdfIn PDF document text
    • http://kbchina.de/upload/89022128370.pdfIn PDF document text
    • http://donaldnathanlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/67124242852.pdfIn PDF document text
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160848cc47799c---pobewijutalupo.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/namusinenu.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096597fd3e5a---bojukoseguxikivujimuwenam.pdfIn PDF document text
    • http://www.ez4parcel.net/upfile/files/2021/06/16/widenuxebokobutowiroma.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/djs9eqbnff9dl6qcimggtl6lrp/5513275776.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=proform+535x+treadmill+owner%27s+manualPDF 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_off0000f159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF159 16644 bytes
SHA-256: 493293636d8c026651417c2833b76eda881af8b568bf960d7f9dd978dd000403
font_01_sfnt_off00011c6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C6C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13483 11144 bytes
SHA-256: e2e21d4d350c9b2b7c87ea8c16d14a91de931f68de664201826035ba17e79d1e

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