Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0001f599b60c2dd…

MALICIOUS

PDF

84.8 KB Created: 2021-08-23 18:55:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 346b57ed26d0f3383cc847b456f6203c SHA-1: 8d5b710f53c1c8d50d20162e454a3814b4317eac SHA-256: d0001f599b60c2dd30046fc20775cdc6dac64116938cde4e218565a8d944756f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to potentially compromised WordPress sites, suggesting a link farm designed to distribute malicious files. The ML classifier and ClamAV detection strongly indicate 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 distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/527h8nv7rieud6qir3l5fcac97/fotogeledixovidawam.pdf In PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160b350b0dc1cf---wujadalubuxosumojefufi.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1606fcf94cd03b---majobiti.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608930af5d730---99141317429.pdfIn PDF document text
    • https://playworkspartnership.ca/sites/default/files/file/87570769783.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/d22fc2e32fc9fe918fd744eb6270985e/29107593142.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/54756472792.pdfIn PDF document text
    • http://bawaconstructions.com/editorData/file/77799455504.pdfIn PDF document text
    • http://anandamsanyal.com/userfiles/file/jomazemisuzolutovelozon.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160943046b3ea3---51021228311.pdfIn PDF document text
    • http://koslita.eu/ckfinder/userfiles/files/roganososovivoxuk.pdfIn PDF document text
    • http://bagumul.com/file_upload/spaw_upload/file/20210620132259.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/63ea6680fa25cbc052c48a858977d574/26298200870.pdfIn PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/h3ghjh2nhajuk46dqolb9aah54/27900278939.pdfIn PDF document text
    • https://fivetc.vn/uploads/files/vafotav.pdfIn PDF document text
    • https://tresonance.org/uploadfiles/wirat.pdfIn PDF document text
    • https://lapiadinafelice.it/file/wovapunuj.pdfIn PDF document text
    • http://arebiatours.com/uploads/files/23390780171.pdfIn PDF document text
    • http://nensi.si/upload/file/woxowareveworavujal.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/70486320324.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a194a8b50b2---wipanagesegibu.pdfIn PDF document text
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5d80dc037---76608895730.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/5s2q594jc3tvcso9c94gaj3g89/20127542525.pdfIn PDF document text
    • https://rumusjitu.com/contents//files/jigiduzujapodekokelib.pdfIn PDF document text
    • https://www.acta-mobilier.fr/ckfinder/userfiles/files/walagelurokojoven.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=vmware+virtualization+for+dummies+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_off0000e7fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7FD 17088 bytes
SHA-256: 5c9f041fbeee2e82101f6524a50c7a2cb9cda646d00819f5b7a930990ee05753
font_01_sfnt_off0001148c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1148C 10940 bytes
SHA-256: bfd49724dde7c539c70417cca7fbb4dc341833b4a2e8350ff7c8e6d427fa149b
font_02_sfnt_off00012df3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DF3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1