Malicious PDF — malware analysis report

Static analysis result for SHA-256 f947fdc59e156ff1…

MALICIOUS

PDF

77.8 KB Created: 2021-09-02 10:07:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 206f693026ad0accbe42f103114691c4 SHA-1: 7f14a8b175fc71cf623c1348eb5929d1354014fe SHA-256: f947fdc59e156ff144636d2427a2d9c12b6387a57a375b2dd208b67c0119ae50
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple compromised WordPress sites and disposable hosting domains, indicating an attempt to distribute malicious content or phish users. The embedded URLs suggest a pattern of redirecting users to potentially harmful destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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://harshahometutors.com/uniformkontakt/userfiles/image/files/96983025267.pdf In PDF document text
    • https://corghialberti.it/file/korolig.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/36d7ea239648949ebc362dfa265ae59e/tiwutukavawudukiromo.pdfIn PDF document text
    • https://creativitagh.com/pevron/www/img/file/55502469781.pdfIn PDF document text
    • http://sartoriaventurini.com/userfiles/files/57468327425.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16110668f8cfa0---81274748728.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609eabe9e05e4---tidugelalesavanubop.pdfIn PDF document text
    • http://zimmerei-possert.at/sujovegowu.pdfIn PDF document text
    • http://gzcil.com/uploadfile/files/bezudegomojerukaleza.pdfIn PDF document text
    • http://cyklo-sport-servis.cz/UserFiles/File/folekufe.pdfIn PDF document text
    • http://bularz-auto.pl/images/userfiles/file/lajidusenotirawugavine.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/8h0ba0119fsrs3j924kjnls886/25674816075.pdfIn PDF document text
    • http://benthanhsgfarm.net/images/uploads/files/gonamu.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16113b922d5569---56228658507.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/f7e8153c0ba24d5216d3e4e6dbee0b2f/27684960587.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/vesarawizavolixibevisoniw.pdfIn PDF document text
    • https://speculatio.in/ci/userfiles/files/45024106953.pdfIn PDF document text
    • http://heaig.org/editor/ckfinder/userfiles/files/69937490513.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610b19e09d45a---dajimetukakitifeg.pdfIn PDF document text
    • http://cybernet.asia/UserFiles/File/kifosepizekupana.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a67ce1ab677---259826390.pdfIn PDF document text
    • https://tavio.ru/files/file/50086398895.pdfIn PDF document text
    • https://otartufo.com/ckfinder/tartufofiles/files/luwuxarudumekem.pdfIn PDF document text
    • http://lacyfamilyunity.com/clients/2/20/203fd950dafdada58ea32e7b96f0d147/File/69761644677.pdfIn PDF document text
    • http://jimigubellifoundation.org/clients/f/f9/f96c94eea877db95ad0a8b6fd709b1ed/File/42220710657.pdfIn PDF document text
    • http://missinternationalbeauty.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/xokurexexolexogeterawi.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607394ec0bac8---34774176088.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=pineapple+at+nightPDF 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_off0000d057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD057 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e869.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE869 16580 bytes
SHA-256: cc4500ca32b5908a47df09a667b7224b1028b880aa0c7bbcb6800f2860db877b
font_02_sfnt_off0001127a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1127A 10144 bytes
SHA-256: d2874077b7a15fc59ddaba906f66d681976f1e7f8ac28095d9256ddc63d12541

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