Malicious PDF — malware analysis report

Static analysis result for SHA-256 6769749108630fd4…

MALICIOUS

PDF

100.2 KB Created: 2021-07-08 08:08:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e24e5cada5c6cb56d47ec5aa7ff62369 SHA-1: 12c054c36399a5dcf42f76e62d179718a6dc10bd SHA-256: 6769749108630fd4c5b073a0ac15640411bd9ed35905eca9a67b46d4615e8f4f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution attempt. The embedded URLs, while numerous, do not contain executable content themselves but serve as lures to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • 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.
  • 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://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/3c7cd42599dd80cbb3a3bc09ec8d52b0/gedejilofijapazufi.pdf In PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/200ab6826c4acde16d08f7acd6aa0be8/zojuwukarebafobenajakig.pdfIn PDF document text
    • https://sieompaysdebray.fr/lesiom/txt/imgadmin/file/gudakiju.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202105161224101361.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096ab93c6449---mugipojuvumidar.pdfIn PDF document text
    • https://an-professional.ru/img/files/file/basutumul.pdfIn PDF document text
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/25eepgqjj5t7br7m1dkv2tqr85/witojivazirowizuseke.pdfIn PDF document text
    • https://amoslodge10.org/ckfinder/userfiles/files/sitateriboritevudewoti.pdfIn PDF document text
    • http://massageindex.nl/images/uploads/90517005976.pdfIn PDF document text
    • http://maslag.eu/userfiles/file/konamad.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607e82cf7fdec---7160124225.pdfIn PDF document text
    • http://moonlightmontessori.com/upload/files/mazopuze.pdfIn PDF document text
    • https://1877painters.com/FCKeditor/file/89957006292.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/6ten4g8hdu4bfbp85l7vahjaa8/47240340684.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bf904a6ea4b---37125681794.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/63181199424.pdfIn PDF document text
    • http://toeicspeaking.net/_UploadFile/Images/file/vutefebodovavidegiwoluv.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/223aa98a98a4e340e989c35e9cd514ff/puvejuxerekebidinexawo.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/50956215727.pdfIn PDF document text
    • http://fmi.lu/userfiles/files/vovikekuzabuxoxelimaga.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/3qalnbron7jtfd37mu34ituqs4/neludobupuvaxusan.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/15036147971.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=pink+cat+pawsPDF 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_off000125bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125BC 10148 bytes
SHA-256: 71c6295481c8b740ed4dc60906865e42487966695459a01b3d844ddd9f9c0ac9
font_01_sfnt_off00013ca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CA6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000154b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154B8 18628 bytes
SHA-256: c541baf5dca4433257a083995eaeef8381ecf125edb5949dd766b2c42fed8f31

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