Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ff1e373ba50ad13…

MALICIOUS

PDF

76.2 KB Created: 2021-09-02 04:02:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3e767b845fe5013801eff074b02c0fb8 SHA-1: 17292bb4285218de76e4e759a6288ae7b48a7e29 SHA-256: 0ff1e373ba50ad1302aa81d7336e928a2bc76c00912b0cec7561f7d3a16c5374
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 and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous links pointing to compromised websites, suggesting it is used to redirect users to malicious content. The presence of link farms on disposable hosting further supports a phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160909969f257f---sumenawuresir.pdf In PDF document text
    • http://digitalpolicycouncil.com/imagenes/file/41835728832.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/7b187d90f63718e3309e21c9075f9a59/ketatitikenaveveguvumovir.pdfIn PDF document text
    • http://murasakijr.com/uploads/files/sizilenuzi.pdfIn PDF document text
    • http://rford67613.com/clients/a/a2/a20594cba7d6fe247bc87ef9b80620db/File/85676958868.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608a4136cc15b---46772054293.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/i5nvuf1os3up73dfsqg2lifvkd/nuvogevomote.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/eb33c59fa7ef88542086226426642de8/vevilixijibajitin.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/4009e9c8d9f6fffc7790b0c28d0eddd8/34577282041.pdfIn PDF document text
    • https://hydratrend.com/application/third_party/ckfinder/userfiles/files/wozodiwawizasekumaresaku.pdfIn PDF document text
    • https://senhewood.com/d/files/55651956230.pdfIn PDF document text
    • http://bindashnews.com/userfiles/file/senevujibosarekesujofutir.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf0a84325c0---19696219310.pdfIn PDF document text
    • http://avandcie-automation.fr/ckfinder/userfiles/files/sinizo.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/9dee5199bcede09efbce033ea384a1af/ziforiwizuxalutuviwi.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612b5c5c5bba8---xariziximijusuvobowuwori.pdfIn PDF document text
    • http://futsalcb.cz/picture/vtextu/file/zogov.pdfIn PDF document text
    • https://himarco.ir/basefile/himarcoir/files/54426865220.pdfIn PDF document text
    • https://mo-space.space/web/img/podborky/files/46117586938.pdfIn PDF document text
    • https://lrsdev.com/userfiles/file/70908263043.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/wogidojini.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b423c7ee52f---11051004993.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607638802688e---femetukojuzulajawajore.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/jtnn3u302tv8ut19acer2flrh7/88242496377.pdfIn PDF document text
    • https://maribon.net/app/webroot/files/userfiles/files/32907422855.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/c1b1b042f0942552cf6e4a9cde45955b/67845095430.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=evergreen+forest+in+tamilPDF 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_off0000c8e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e0f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F7 10608 bytes
SHA-256: e654dbb8ea64e22cc11f5dc808302d5dde35d9d542c68bb6c12d29d468fa440e
font_02_sfnt_off0000f931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF931 15464 bytes
SHA-256: 28e3124ee26783f4cd94cff61f44d2a91c00edf62d6fd61b4a71fcb01ba23a12