Malicious PDF — malware analysis report

Static analysis result for SHA-256 06d8f03086605523…

MALICIOUS

PDF

84.5 KB Created: 2021-09-05 22:51:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: cfd6a88becc897a4bc497cc191c329b7 SHA-1: 95a8a23aea387a5180ef1879ca4ae969a303f0f2 SHA-256: 06d8f03086605523e5a3b7db3eadb2723a1720973ecfff72a5d9a9e8c3b4e763
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, forming a link farm. This suggests the PDF's primary purpose is to redirect users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://klimagra.pl/images/wysiwyg_img/file/toluvowede.pdf In PDF document text
    • http://profil-metall.de/content/uploads/file/fafasemuwipujelufomupozig.pdfIn PDF document text
    • http://jts-electrical.co.uk/ckfinder/userfiles/files/zefakini.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/af392a3480533ee6f204d80c67468b3a/labapus.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b704c64d1---99539094623.pdfIn PDF document text
    • http://jhdjt.com/images/upload/File/bozovazekituwupun.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/ffc8853b96fa7ca30c56dd9d599380b4/bowivadufifuzitotakagat.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/5af953289376b2b79140055b3a29f277/7457649250.pdfIn PDF document text
    • http://duszek-lasu.pl/userfiles/file/babewafujojofe.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d0a3bc283---gisunavibotod.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/78407261926.pdfIn PDF document text
    • http://divorce-difficile.fr/userfiles/file/92781168370.pdfIn PDF document text
    • http://mstreatmentadvances.com/userfiles/files/95318722361.pdfIn PDF document text
    • http://monikaknoblochova.com/userfiles/file/20294421422.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/9ac8e70fcebbeb6c5445019dde5616ef/digabawidurilabo.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1611680f6f3ffd---34960248160.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608140cb7d0db---sebos.pdfIn PDF document text
    • http://bachova-terapia.sk/images/file/mamirufafivogaremafufajog.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/56038284241.pdfIn PDF document text
    • https://circolodelpistone.ch/userfiles/file/37078248044.pdfIn PDF document text
    • http://infrabud.eu/fckpliki/file/giminiruwoxegawot.pdfIn PDF document text
    • http://firewaterdamagedfw.com/test/fckeditor/uploadfiles/file/4138817445.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4c0c687271---gaxate.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=dirait+on+morten+lauridsen+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_off0000e0b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B0 19024 bytes
SHA-256: 760694ff348bf53f59d9616801594c6a69518917fd6a9ac0d08cf7f412301819
font_01_sfnt_off000111e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000129ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129FF 10760 bytes
SHA-256: 7de596f58bb1310d3b22b51adef29cac255972229a75599d6090c36fc9c308eb

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