Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ce0c7ed47b33a99…

MALICIOUS

PDF

77.6 KB Created: 2021-09-07 00:58:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 7847d5bfe39d2d406a67d3f85a676b38 SHA-1: 33b24972fa539d32129a69fda2a5f96840662a58 SHA-256: 6ce0c7ed47b33a99d8fd75001ebca0d5324055f7d46e94db3cab81f588b762a5
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories on various domains, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. The document body is heavily obfuscated and unreadable, providing no direct content clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/16082610ab71a3---jubudajasusobe.pdf In PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/5c75e71cac9dde65b8ad791b92e76e8f/7741862981.pdfIn PDF document text
    • http://agama-rc.com/upload/files/30058611737.pdfIn PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/16739939771.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/vti3j6kcjmol3ubhrn896p1r5h/94384452632.pdfIn PDF document text
    • https://www.ccs-corporation.com/ckfinder/userfiles/files/44465576170.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b147dc4e78---32357742278.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2c3052b499---ritipuzugurulesaxipu.pdfIn PDF document text
    • http://superfasttv.com/uploads/files/31067730149.pdfIn PDF document text
    • https://deltagroup.bg/uploads/file/63572098918.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/aece767fc4d5f03a31119692cdba8119/54614120674.pdfIn PDF document text
    • http://zit-tech.com/userfiles/files/ranozo.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/8gab8c35i6cceklje6baaakfp0/dumoxaguge.pdfIn PDF document text
    • http://andreaslasnik.com/data/files/kirewibawepa.pdfIn PDF document text
    • http://megat.pl/uploaded/fck_files/file/43269832195.pdfIn PDF document text
    • https://artenika.pl/fck/file/57607908702.pdfIn PDF document text
    • https://buddhaart.in/userfiles/file/karewomepazikavuniril.pdfIn PDF document text
    • http://tiga.co.th/ckfinder/userfiles/files/96431073073.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d06efb126b6b4a6e36a45db9a8903591/naresukovujilujal.pdfIn PDF document text
    • http://balade-pierry.fr/userfiles/file/56532828372.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160fb25e2895da---33637807872.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/mbhmpt9kllo1hji6pea4du4frr/gedasupetox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=jlg+450aj+specs+pdfPDF link annotation
    • http://irodori.kir.jp/files/file/29027776507.pdfIn PDF document text
    • 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_off0000c803.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC803 10736 bytes
SHA-256: 33ac7941ad9933426d4581d771613ad397684037cb292724caad8998817ea2e0
font_01_sfnt_off0000e0bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f8d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D1 18484 bytes
SHA-256: c4c7699b330347928c0c4b5f3c4bb00ea43a7c0768427d345d9aa8b766b85587

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