Malicious PDF — malware analysis report

Static analysis result for SHA-256 223be8f8b59e7fa9…

MALICIOUS

PDF

84.5 KB Created: 2021-07-16 18:35:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: aae897171f1e454de0b947ec077e7c4e SHA-1: a1fd423a50d95d4e659acd903203dc46a2965b83 SHA-256: 223be8f8b59e7fa99989bc355bebb5c063f9ad42220148ebb8023253a7c0835f
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and a machine learning classifier indicated a high probability of maliciousness. Heuristics identified the document as a link farm, with many URLs pointing to potentially compromised websites or disposable hosting. The embedded URLs suggest an attempt to direct the user to external malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://roanfamily.net/clients/0/01/01b24a6c100194bbc8678883f3cd4a53/File/kimowi.pdf In PDF document text
    • http://elcampoeco.org/FCKeditor/file/22907944102.pdfIn PDF document text
    • https://himalayanthailand.com/image/upload/File/josepovotozowifedilubani.pdfIn PDF document text
    • https://medtek.vn/storage/file/21161838919.pdfIn PDF document text
    • http://trustarshida.co/cache/fck_files/file/29085510841.pdfIn PDF document text
    • http://nhatnguyen.vn/media/ftp/file/2797484861.pdfIn PDF document text
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/5hkdjp6nahndte8li0uehio15d/70286747875.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/rc7narhdcjiub6j2c9fin3411k/10032802104.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608744bcb71be---xudulanaj.pdfIn PDF document text
    • http://zulassungsservice4you.de/bilder/file/gowubiruga.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/89sebv9ehoemdq6ff5esj83b45/93077801973.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/9bcf9a343bc0d469cc40df9a317896ec/vorodurofamufaratanez.pdfIn PDF document text
    • http://asiancfea.org/userfiles/file/gotegoxegupafowidab.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/9ad7vnbsij2fk4gk04aq5aats0/32709242561.pdfIn PDF document text
    • https://medtek.vn/storage/file/dimuxatojiserokopidarixo.pdfIn PDF document text
    • https://agentcctv.com/userfiles/file/20108993526.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/29ec41e04dbb06e6905558074e5a21c5/70058783890.pdfIn PDF document text
    • http://rheinmotel.com/userfiles/file/66255693845.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/c6832c68627ffbb7c5db513ed7e80a74/webitaxaxi.pdfIn PDF document text
    • http://anaminfo.com/attachfile/file/45706118896.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/7138022228.pdfIn PDF document text
    • http://churchtextile.com/userfiles/file/34960656185.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=average+music+therapy+salary+by+statePDF 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

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_off0000e646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE646 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5D 10996 bytes
SHA-256: b58b5d153b415eb7cdf70de479900accf54d6eb40c845c8e485b9a60df1c5a01
font_02_sfnt_off000117c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117C9 16600 bytes
SHA-256: 125f108ebd41f9dc20eb1723d828320bea35136fc33c2e0d82b9999162d9060b

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