Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1d9ecec2a41a285…

MALICIOUS

PDF

81.3 KB Created: 2021-09-03 06:56:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 3a7419902c515befa234a85fbeab337f SHA-1: b7138d423aa6aae608507075dd65fbb2a56091cb SHA-256: f1d9ecec2a41a285512b76dd680e6b874c027f2ca0d00de33a97c491ef201d96
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous links pointing to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm designed to obscure the true destination. While no scripts were explicitly extracted, the PDF structure and the presence of numerous URLs suggest it is designed to redirect users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://weblative.com/wp-content/plugins/super-forms/uploads/php/files/o2hpa9k2garkcporj235sdtt5r/wenuzenikotafugulo.pdf In PDF document text
    • https://ludifrance.fr/userfiles/file/70939886926.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/aebf5be345efa4360fb6d3bb94819b03/xoluxoxumiwotigexofewa.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160c93feb88e36---58357008250.pdfIn PDF document text
    • http://kimura-shihoshoshi.com/userfiles/file/figogix.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608267de90de0---62984094529.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/ss3glu7m9nlfnjcniajhrk6h5m/fapazuxiselibadibajofak.pdfIn PDF document text
    • https://edusfera.pl/upload/file/mizidovuxaxujiza.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/1612d6e54a724b---juravotivemakib.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/161218dbd093e4---91114321423.pdfIn PDF document text
    • https://ideylia.fr/uploads/file/nesafirimeme.pdfIn PDF document text
    • http://maslatalaia.com/userfiles/file/solapiwewimuxuratatiw.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/ir0igcfk8ahmv70p4duduhf6g5/62236171351.pdfIn PDF document text
    • https://bibliotheque.ville.deux-montagnes.qc.ca/ckfinder/userfiles/files/81581007695.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/2021811656554600.pdfIn PDF document text
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/67984709488.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a08d69c5a93---43137132795.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/g8r2ftuejgpb3c44lj6toiorp8/37032849249.pdfIn PDF document text
    • http://stark-tools.ru/images/uploaded/jusuzibifemakadumamilosig.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8f6ab9831---14008351868.pdfIn PDF document text
    • http://giftboxvietthuy.com/upload/ck/files/9458613461.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160b940d099265---72720705716.pdfIn PDF document text
    • http://ingpoggi.eu/userfiles/files/sezof.pdfIn PDF document text
    • https://tatvan.in/userfiles/file/tepatovuwanikekagipazusa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=carver+caravan+water+heater+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_off0000daea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAEA 17448 bytes
SHA-256: 0bc3db3071eabe58315db0471b478f3cea4cc48ce3f5b0eb026293329b70e858
font_01_sfnt_off00010835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10835 10396 bytes
SHA-256: 8398871ac6ca759cb7b5ddf07e78bb77a9423edb14b2b6059596161010a147b8
font_02_sfnt_off00011f96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F96 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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