Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c47269b9ba93544…

MALICIOUS

PDF

74.0 KB Created: 2021-09-06 07:49:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ba621392ed7ddc55af8236760b2a2f93 SHA-1: 3940e4cdbab34534fea1d538d6ca996efb944300 SHA-256: 7c47269b9ba93544b28d334970b6f1c0a9d3de2f6e1e841406f457d299dfa861
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to potentially compromised websites and disposable hosting, indicating a link farm designed to redirect users to malicious content. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of embedded URLs and the structure of the PDF suggest it is part of a phishing campaign or a distribution vector for further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/hb5rdt3rr88u0kaaulaskjiq43/tebowilukadodurovex.pdf In PDF document text
    • https://angelsolutions.ro/ckeditor/ckfinder/userfiles/files/vegavawu.pdfIn PDF document text
    • https://citronel.com/userfiles/files/mufuliwulazilebe.pdfIn PDF document text
    • https://fonixkoncert.hu/upload/file/tokebokuturewegimenozo.pdfIn PDF document text
    • http://cafesezony.ru/fck_editor_files/files/26738960992.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/14269b03281cdc0bb50c0acfef583586/gukimagefa.pdfIn PDF document text
    • http://chinajessie.com/seadata/data/uploads/img/file/162343172733.pdfIn PDF document text
    • https://blv.by/upload/editor/files/85680412796.pdfIn PDF document text
    • http://ithalattagarantibelgesi.com/resimlerfiles/wafavemebotetofavape.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/lulevugugimopugeregar.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ad0af800189---wexum.pdfIn PDF document text
    • https://teenvolunteerhouston.com/wp-content/plugins/super-forms/uploads/php/files/b342df073fd0cf38ce584d4e89c26b71/jazirojeludemojupixigel.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/07c426e96dd75a27ecc50712e83bc3c7/terebinewiviwefunubiruvib.pdfIn PDF document text
    • http://cleangroupbd.com/ck/upload/files/mekemi.pdfIn PDF document text
    • http://rheinmotel.com/userfiles/file/sazirutezipijelav.pdfIn PDF document text
    • https://papersacksfactory.ae/images/bulk_images/files/16143968343.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bd3e079353e---rivilelowofatitune.pdfIn PDF document text
    • http://ersatzmonitor.de/userfiles/file/ravavizidajukoxegefovasu.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/d296a295b0220886c1efcd0cb219e156/vedaruxuxi.pdfIn PDF document text
    • http://txextremecarts.com/userfiles/file/84189842501.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160b1aa5fb666d---55512130550.pdfIn PDF document text
    • http://www.mecateengenharia.com.br/ckfinder/userfiles/files/fapixug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=2001+pontiac+sunfire+service+manual+pdfPDF 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_off0000bd5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD5F 16716 bytes
SHA-256: 4376fa12f765301f2f54fc1fd1babfcac8ebfed259e66142b4fbfe1f3d3d542c
font_01_sfnt_off0000e84d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE84D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10064 11144 bytes
SHA-256: beeebdcf9889da24506e6487433cb199870869ef67317ac83342c5aedb3a2c49

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