Malicious PDF — malware analysis report

Static analysis result for SHA-256 c00e5a510f492d67…

MALICIOUS

PDF

101.9 KB Created: 2021-07-03 04:50:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 845189874f09f539457362d778b45298 SHA-1: abc935155b4b65e73adc07ee33962a7a6bd46dda SHA-256: c00e5a510f492d67f4c2ba82be11830e09c7d6e2b26728ba9f38aa7a80bc6bc7
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing and potential trojan payload. The file contains numerous links to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download' button lure further supports a malicious intent to trick users into downloading further stages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/1e3acabf39f7012f607415e06bae14fb/2619642789.pdf In PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/8d8343cedb87819c04d2fa14fcb89a93/masojakujepame.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b17b6ab505---febopenuvobuje.pdfIn PDF document text
    • https://biocoils.com/img/file/puvarosisilejuxegu.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/ed37bd97d0fb1c3df5f6f38989760429/gasedepalawu.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160755adc77bc1---70898334072.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc187cad68---naraso.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/34045940468.pdfIn PDF document text
    • http://inimtrento.it/userfiles/files/vuwer.pdfIn PDF document text
    • https://pablohernandes.com/wp-content/plugins/super-forms/uploads/php/files/98bdc3700e99a0ab8a51fb41cf4d93fd/mafijukorizokiti.pdfIn PDF document text
    • http://bagliodeimille.it/userfiles/files/rutevejalabipusirud.pdfIn PDF document text
    • https://ppuhperspektywa.pl/files/edytor/file/76049369843.pdfIn PDF document text
    • https://prairieroseclothiers.com/FCKeditor/file/zovakemosojaked.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/1l09od39mpmv2dj2mh9uer5hnp/95976946435.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160841a672ccd9---xugomejuzematalanil.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b23cce3b687---35728193651.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/fceec78db3b014c2ceff90ffba427a58/63431398497.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/2ca136d6f5f35d678a67aa1bfa643926/jinisako.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/9507391460.pdfIn PDF document text
    • http://phantasos.org/userfiles/file/bifusogorizu.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16077427d6add6---14729022406.pdfIn PDF document text
    • http://handbook.hu/upload/page/file/75964299583.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d39348a3bc---melapajo.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bce92bd9e3c---rulomorexopututeb.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2c3ef1402---jifuwowezilerakiresupo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=toefl+test+with+answersPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001156b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1156B 17908 bytes
SHA-256: 4d4fdb856fde15ef0af54921c0b0e5290bf162ec971d5a2ac48eb65fbfdb8609
font_01_sfnt_off00014420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14420 10360 bytes
SHA-256: 158ac62fa7fd8d3334e2e568d48213410a6a738843f78cb6689f85763d034e6a
font_02_sfnt_off00015b8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B8B 16376 bytes
SHA-256: 0c133022d1e9883d2ff7035cf84f1fa0be9cfa0d671266bc5a940283bc0f9855
font_03_sfnt_off000171b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x171B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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