Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0a53e04ce75ce0c…

MALICIOUS

PDF

75.5 KB Created: 2021-07-20 22:51:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0e9cb324693d14d46c9bb87afb48978a SHA-1: 6e0e8e7b2138a3e176b9c6fb1626aed69f151f86 SHA-256: f0a53e04ce75ce0ce932b29bd680a732d76e358063f7c4fdea5abad98377e565
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. No scripts were extracted, but the structure and URL targets indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160821b8cd363d---gexowug.pdf In PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607df1ace7327---25863806459.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/30048267602.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/365d2239349c5c19d27724132983543d/losoworejukuwepelinubike.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/bc08e864027116eaa08b60488abb527d/zonuzomoz.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/4d29ba2639526f185460d34ebd1325b9/turovobixaxizuzo.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/54b58d98feb758ce4474007d8f6021df/60212445787.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160979f297e025---mevejutevibizolila.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160accf093c844---16955189807.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608016eb0f80c---jasavurifanomewezegusu.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607378c477f61---taxifanoxidasizur.pdfIn PDF document text
    • https://flyags.com/editorResources/file///nixawefude.pdfIn PDF document text
    • https://yesilkoyluleriz.biz/resimler/files/71153177430.pdfIn PDF document text
    • http://plncse.hu/php_data/file/69027118544.pdfIn PDF document text
    • http://ciskmv.com/css/file/pejamujirotebovopezebaza.pdfIn PDF document text
    • http://evergladesharvesting.com/ckfinder/userfiles/files/tuvafawomimizoxuv.pdfIn PDF document text
    • http://gdaniec.com/upload/files/28905002986.pdfIn PDF document text
    • http://hgbs.de/userfiles/file/333620434.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a5984aef117---kokasodafufelutifatudor.pdfIn PDF document text
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/177e674c38bb99c463ca86855a0c893f/fosuzes.pdfIn PDF document text
    • http://www.wiz-fac.com/uploadImg/file/powogefukadifenezufo.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/68788618393.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=level+27+wordscapes+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC679 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000de8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE8B 16320 bytes
SHA-256: 9e2b497566a40bf7549c90ea4ef74c6229c644a84ef93584d1125ad883a1ce10
font_02_sfnt_off000108b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B2 10596 bytes
SHA-256: d053f097fb0b83490830117fa85d41270ead86caa87c782a01a5dc210171a553

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