Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a32a2ec2520721a…

MALICIOUS

PDF

96.4 KB Created: 2021-08-21 06:12:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 415515ee8d433e5f37f789cb0cef6a87 SHA-1: 35b34a50e2cee1ee2c77b40fd06d0ae70726b52e SHA-256: 1a32a2ec2520721ab3b1dd5905f1daace15b55dcded699874f0257607a9e75c0
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links to external resources, many of which point to compromised WordPress upload directories. The presence of a PDF_RANDOM_URL_LINK heuristic firing indicates a high likelihood of the document attempting to redirect the user to download a secondary payload, such as the PDF found at http://artistalexanderkanevskywinnerinternationalaward.com/clientMedia/file/xowif.pdf. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/df0a39bbdcb28b0378a32bfdcdba3164/34314803428.pdf In PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba129b9e0b2---wekozosulonuforugufik.pdfIn PDF document text
    • https://cheesykeju.com/contents//files/31772551909.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16074d94d9ce81---39587520495.pdfIn PDF document text
    • http://yjccnc.com/upload/files/zofoxedideziguro.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/16080348589652---jewuzimatuvox.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/40697de571fad341e8fbcac79ad2cecc/rubuw.pdfIn PDF document text
    • https://smsenerji.com/resimler/files/30144281824.pdfIn PDF document text
    • http://artistalexanderkanevskywinnerinternationalaward.com/clientMedia/file/xowif.pdfIn PDF document text
    • http://naitikfashions.com/ckfinder/userfiles/files/48671393380.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d8ee937b9c1---49174116470.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/dd4b27f2a55731c9dd602727131d25c9/wunimuvebotuguloxesarerum.pdfIn PDF document text
    • http://zigzagontwerp.nl/sites/default/files/file/pozujezufifopube.pdfIn PDF document text
    • http://alphanaturehk.com/userfiles/file/nowepivivunetabotokokak.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610c9f9e38acd---tumoxiberamoga.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c04a12055df---15813059567.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/66b75572088a1ed8e13b60f2e5e45d73/xisubapofoxaritinupa.pdfIn PDF document text
    • http://textingrights.com/userfiles/files/lizimeget.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/vumafedekomas.pdfIn PDF document text
    • http://laboratoriodiprogettazione-ve.it/userfiles/files/ketaxoribizodokamev.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f46fd83fb62---sofipot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=scaricare+spotify+craccato+android+2020PDF 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_off00011115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11115 11000 bytes
SHA-256: 8efef66a706f87b19b2f888c951595cd495ccf774e8d2180d7b01d1718cc88b6
font_01_sfnt_off00012acf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ACF 19120 bytes
SHA-256: 397ffb3c587fc1c8eb99b4d2fa04544e384f4f955e38d67b0be29bcb19493b1f
font_02_sfnt_off00015bd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BD0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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