Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7ca49681712d921…

MALICIOUS

PDF

72.0 KB Created: 2021-08-28 11:04:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ed3539568640582bc94985a2d115febb SHA-1: 9b4ea218bb008791ca8ec20b466895a96161c4e7 SHA-256: c7ca49681712d921a7417754ae5322921126c7fdbbe202dae62bc37a7c9615b7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. Numerous embedded URLs, including links to compromised WordPress upload directories, suggest a phishing or redirection scheme. The PDF structure itself appears to be a link farm designed to direct users to potentially malicious or phishing websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://archism.ru/uplcv?utm_term=seinfeld+cast+puddy PDF link annotation
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/3b7v595ai0tdbar6hr2t7484ge/xozodiguwavizuduge.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/nebesemipul.pdfIn PDF document text
    • http://wm-meyer.de/meyer/admin/editor/ckfinder/userfiles/files/bujidotub.pdfIn PDF document text
    • http://inwallendorf.de/userfiles/file/viresanubuxokevasagiva.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/vc6seljpagnafcaj4ieuti3sf4/23715782945.pdfIn PDF document text
    • http://chrisdepanneservices.fr/Sites/cds/files/pepimizasigatiga.pdfIn PDF document text
    • http://dmkaudit.sk/101/upload/file/lazogifasotinamoz.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/1609e41f21777f---panomep.pdfIn PDF document text
    • http://elai.kz/upload/2021/08files/210815135644871425v7xzl.pdfIn PDF document text
    • https://calmoinc.com/upload/editor/file/23713443850.pdfIn PDF document text
    • https://comfortinnbarrie.com/phpsites/vertical_living/uploads/file/31900788491.pdfIn PDF document text
    • http://moto-bike.pl/userfiles/file/dopumanebefojinife.pdfIn PDF document text
    • https://noddy.nu/images/file/34769840332.pdfIn PDF document text
    • https://www.acetechnology.co.in/wp-content/plugins/super-forms/uploads/php/files/h6st7irr9ql1qqbu5ho4d98qkd/puraj.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160781c9d4db84---zubogoz.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160741cdc05e56---57511357232.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a443b866982---86027303760.pdfIn PDF document text
    • http://sgyscom.com/upload_fck/file/2021-8-22/20210822020556712053.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/67655516757.pdfIn PDF document text
    • http://cfh2.com/clients/d/d2/d2a7b52150a7a947468b52e9b7560e3c/File/32357629132.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/5b8999de405d87c3c85d9d1e72e840f9/lejuxugeg.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b8a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8A5 10684 bytes
SHA-256: 594908a6238c9caca0210e60d74653eda04e48bcbedd5187c26e614b4f537a8c
font_01_sfnt_off0000d140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD140 16200 bytes
SHA-256: 58089982cd9327db9d6e641085c2dd94a162e4938cc8a6d78502f24d9d0b07b0
font_02_sfnt_off0000fafe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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