Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e6fab4c7d688f54…

MALICIOUS

PDF

159.3 KB Created: 2021-08-18 00:30:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6214eb38a1a35f38f1497ab29692bf27 SHA-1: 6edb4ea14b0714f74102412f2e830abdd32de21a SHA-256: 0e6fab4c7d688f5448683f23757e889c751a46d3a7a8fbea8209beb74995f597
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV heuristic strongly indicate this PDF is malicious, specifically flagged as a phishing trojan. The document contains numerous links pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and numerous embedded URLs are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9921

Heuristics 6

  • 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.
  • 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://legyenegyjonapod.hu/userfiles/files/xituzufiputadotiviteliz.pdf In PDF document text
    • http://dansungsala.com/uploads/files/pivarusodasolij.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/futugiwiwasawosor.pdfIn PDF document text
    • http://studiotecnicoprato.eu/userfiles/files/56510692206.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/2dab734cc452e7600f0430c82cee075b/romowanoda.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/neseko.pdfIn PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/91726319448ce743cdeaa0607c53d33b/97709775423.pdfIn PDF document text
    • http://bbbswalkforkids.com/clients/c/cf/cf8d0549bdc9bbdffca8bc0db9808b96/File/27297582330.pdfIn PDF document text
    • http://business-plan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/zuwamovuwaru.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f2e058845---ruroxalojasa.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/3208760e73b8e2b64d66aafffbbd0845/gexoxewuj.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/16081ce4ea726b---31701300617.pdfIn PDF document text
    • http://www.thaiboat.net/image/upload/File/10966142293.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608687110483a---47758918493.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/172e48b9ca5b17a8e1947ca07cc9e7cd/ronufipodaxuwo.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b4f24dcd05f---57135130988.pdfIn PDF document text
    • http://vonschickenconcord.com/uploads/files/vilidokom.pdfIn PDF document text
    • https://oancora.com/ckfinder/files/posavajokupipazoga.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a1876fef256---1573602872.pdfIn PDF document text
    • http://studiofelician.com/userfiles/files/wizepawijovuribajivozenof.pdfIn PDF document text
    • https://hnhaa.com/userfiles/tnejp//files/mawegolukolijif.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/vatajuledejupapawase.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/90v6ij6u6kd8f37eelv6smrq36/73438998107.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/32e8d221efa2ba6e0a92179938e7ef6d/feveferomepipuv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=parallel+lines+and+transversals+worksheet+gina+wilsonPDF 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_off0001f369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F369 10772 bytes
SHA-256: b07f80ca318cc95b587beeaf47c2f8699f41b2e2aa072c5e9f2d9495b6a7b8b7
font_01_sfnt_off00020bfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20BFB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0002240c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2240C 16084 bytes
SHA-256: d11bfa2b02c462a3f9075532ce7ec1132ca3691ccd6a850e0dcf0119a218c04c
font_03_sfnt_off00023940.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23940 19624 bytes
SHA-256: 72fdb885ca0db5b92e9d822e6c9cd948c137b5a86703acd8505e9d98cdcfaece

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