Malicious PDF — malware analysis report

Static analysis result for SHA-256 120a0f14d80e41a5…

MALICIOUS

PDF

80.6 KB Created: 2021-09-01 05:35:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 83abb67be101f4dd8a4057bdf3f29a04 SHA-1: 43acf0ddb9c1bdd28774702634b26805ccc01961 SHA-256: 120a0f14d80e41a534a6973e81e10c0a2861271a062a08ac4cd3f4cf731cd0fe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to host and distribute malicious content. The presence of numerous unknown URLs indicates a potential phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091295ce594c---12187516543.pdf
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/037aea03b50446e0eb4e92cfff288fda/95663494619.pdf
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e1abe32a05---vigefijorotokeze.pdf
    • https://koratspring.com/upload/file/13372926470.pdf
    • http://techhssilverbuffs.com/clients/61416/File/43503872438.pdf
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/b5806d2b255bf8e991972caf66f451b9/50938931556.pdf
    • http://langeline.com/ckeditor/upload/files/37069483719.pdf
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1611629900d478---67357379836.pdf
    • https://zoomkish.com/basefile/zoomkishcom/files/navali.pdf
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160f0bcdf1c96c---78625434264.pdf
    • https://www.adilaltinsoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071a3f6b319c---xaduvojofubedulikux.pdf
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/9b8d2f485054bdd091ae01190e0895fd/lavekomilewigizef.pdf
    • http://handlpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/64620127274.pdf
    • https://cahayaapi1.com/contents//files/64168433548.pdf
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5e285bf200---79659487270.pdf
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4553e8feda---kasadexivonun.pdf
    • https://dejavuruse.com/userfiles/file/26253815226.pdf
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/7gf46up6aa2lrkci5q6urtetvm/73284468169.pdf
    • http://americasbestwingsbeltsville.com/uploads/files/28344414644.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+spell+song+in+spanish
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4e9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD4E9 16792 bytes
font_01_sfnt_off0000ecfb.bin
cb16fcd54cef225150c9474b8fedb2a854c227b3666163687febf3ba42f3bb44
pdf-font-stream PDF embedded font (sfnt) at offset 0xECFB 18660 bytes
font_02_sfnt_off00011dbb.bin
7de7a9e3662d6e6c1d32304c3ceea488b859741a510451b6fffb4ed7757a5862
pdf-font-stream PDF embedded font (sfnt) at offset 0x11DBB 10508 bytes