Malicious PDF — malware analysis report

Static analysis result for SHA-256 d34dfe39f78b986e…

MALICIOUS

PDF

86.5 KB Created: 2021-08-07 00:43:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a74eb4b46d2609a4ebed45c9f6b6bb2f SHA-1: f15776e877d36df2664daa9d1ff61fffabb3ca85 SHA-256: d34dfe39f78b986e22e6c5e92f018e54e4c58aeebc1434439f4779f0ab74759a
156 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution through these links. No scripts were extracted, and the document body was unreadable, but the URL structure and heuristic firings are sufficient to assess the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://bandotrading.it/uploads/file/zijimezodujutix.pdf In PDF document text
    • http://bannhuaduong.net/upload/files/jokuzo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088ffb7e73e7---ganosaxaze.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3442f3412c---80848774382.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/dsl132mv1hhpc75msrqoqld3l4/11918004969.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ab692e00a---73993542980.pdfIn PDF document text
    • https://salvamontbihor.ro/app/webroot/files/userfiles/files/merod.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/zelijukexipenemupujenusa.pdfIn PDF document text
    • http://donghozibistore.com/luutru/files/tibasubuwaguwawejigomab.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/1044caa3c91c3add7562cd51c873d644/tofukubikikelikunapevetig.pdfIn PDF document text
    • http://abwessex.com/uploads/files/majaf.pdfIn PDF document text
    • http://lesbambousbleus.fr/ckeditor/upload/files/6184193280.pdfIn PDF document text
    • http://thietbiotovn.com/Images_upload/files/badewusugozolamenewiret.pdfIn PDF document text
    • http://seasonsblinds.com/uploads/ckfinder/userfiles/files/susatetaxulutomagivexeda.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/92823kvok6jbpadjsj1hltj1g1/62111956285.pdfIn PDF document text
    • http://udokutscher.de/gfx/userfiles/files/gewezilikurukol.pdfIn PDF document text
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5f1c0c46b---zorawaxewor.pdfIn PDF document text
    • http://www.szphotar.com/admin/img/files/difofopolosejajexoxogava.pdfIn PDF document text
    • http://jyotiacademicpress.org/uploads/file/pigowegurilopunoza.pdfIn PDF document text
    • https://kipass.fr/userfiles/file/29451917314.pdfIn PDF document text
    • https://aglogistics-bo.net/userfiles/file/vipafax.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/ac764f1036bb1b05ff8498e7fe4d77bd/doxekaporajeguguwenixufi.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090b93a0a2e5---nalamasaropim.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=can+i+play+age+of+empires+on+androidPDF 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_off0000ee50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE50 16992 bytes
SHA-256: 0127995d7ce442b49e270c380fb60bb209068773f62a14fa3e3b494f7059837c
font_01_sfnt_off00011a5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A5F 10888 bytes
SHA-256: 0295a53252e189c56502797caddfc5ab0642ba06e88c12098fabecf5bfd5079f
font_02_sfnt_off00013353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13353 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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