Malicious PDF — malware analysis report

Static analysis result for SHA-256 0153347c592a5849…

MALICIOUS

PDF

82.2 KB Created: 2021-09-04 07:04:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5e73e1e8e23e64e87ef85104e2ea6e42 SHA-1: 8817e7c408b4ea537a40363b58e1900dfef6df2e SHA-256: 0153347c592a58498cffd6f2a7eef1102e1ecbd2376c0ec45b139c8b49023774
164 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to disposable hosting or compromised CMS uploads, characteristic of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. The 'Urgency / deadline lure' heuristic further supports a phishing pretext, though the document body itself is unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://plafondchauffant.fr//img/user/file/18114210502.pdf In PDF document text
    • http://mail.teleserviciomalaga.com/ckfinder/userfiles/files/zunoziwodazotedorulux.pdfIn PDF document text
    • http://pc75.net/upfiles/file/1630368667.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc27b09d53---gotazuj.pdfIn PDF document text
    • http://www.mueblesgamez.com/ckfinder/userfiles/files/kopupava.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160c3a52bdc70c---fuzakewosuki.pdfIn PDF document text
    • https://thuaphatlaihoanghuy.com/uploads/files/53626830781.pdfIn PDF document text
    • http://soflocops.net/clients/81266/File/busonedetujawezesawi.pdfIn PDF document text
    • https://hanmarklight.com/UploadFile/files/fofefidufegu.pdfIn PDF document text
    • http://fatamorgana.fr/uploads/assets/file/zorogujeraxezoruk.pdfIn PDF document text
    • https://bednidhitraders.com/userfiles/file/18203108941.pdfIn PDF document text
    • http://cartonwrappingmachine.com/userfiles/file/nejibigo.pdfIn PDF document text
    • http://zzquansu.cn/d/files/vivomodaweruwapelati.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/35a1a9d477278dc51771ba54eaf78b5f/97072440983.pdfIn PDF document text
    • http://auto-spec.ca/fck/file/xiwidagivaze.pdfIn PDF document text
    • http://ukrainski-rosyjski.pl/userfiles/file/xuniselutol.pdfIn PDF document text
    • http://russia-ex.com/images/blog//file/99442250222.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/16102e618c47a9---binorefoviv.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084d5b71b7e0---sorupuluwemowujodukelitek.pdfIn PDF document text
    • https://jasz-pap.hu/UserFiles/file/vupunatizajusaluzefopedar.pdfIn PDF document text
    • http://opusincertum.it/userfiles/files/venixixojolizubaweviw.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160cfd8948893b---wexozovevizavukote.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160779162d51d2---jisekenewoxewokujuwuwed.pdfIn PDF document text
    • https://pjkconstruction.ca/images/file/15179953723.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=conceptual+physics+12th+edition+paul+hewitt+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_off0000d866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD866 11120 bytes
SHA-256: fda317fc55f00a324df7e8ceb78104c62888d65be3bdb1dabf9a5c938f61c202
font_01_sfnt_off0000f27b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010a8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8D 17784 bytes
SHA-256: fd3077897b6ce158e61245a64bf1a5dace5b737c428f54dd3d4842c8a9916755

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