Malicious PDF — malware analysis report

Static analysis result for SHA-256 6293c9eeefcaf23d…

MALICIOUS

PDF

83.4 KB Created: 2021-09-04 20:14:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1c3c038006e0f57acfae0af56ec30424 SHA-1: 7891c48e3e059a626b0e93e2d45b5cd4ce7bf7b0 SHA-256: 6293c9eeefcaf23dd98abcf3be786d7479931cac5074ae75f8c04d37abb918b1
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The critical 'SE_SECRET_RECOVERY_LURE' heuristic indicates the document's primary purpose is to trick users into revealing sensitive recovery information. While no scripts were explicitly extracted, the presence of numerous URLs, many hosted on compromised or disposable domains, suggests a phishing or credential harvesting campaign, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16076463d1dff8---pelimuwemuzotijazafi.pdf In PDF document text
    • https://kaisar168.com/contents/files/zagatujozizanokara.pdfIn PDF document text
    • http://hoachathoanggia.com/userfiles/file/lowatodepaginuxoxilaj.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b95e9b5c4---nakames.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/wusuz.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/ba351b592c567qtsmijph79llp/riwukuluvujajuf.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/52eb3257496bc4ca773a74d9046b18bc/33350713450.pdfIn PDF document text
    • https://advik.net/userfiles/file/81741226302.pdfIn PDF document text
    • http://remont-elektro.eu/archiv/file/zodatupa.pdfIn PDF document text
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/qdvsvoa5eqtand1j94q40a5pts/41494522810.pdfIn PDF document text
    • https://nepalimodelagency.com/userfiles/file/rajubagutebunefoj.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606e798cd784c---71880816527.pdfIn PDF document text
    • http://kubabus.cz/novy-web/upload/file/lalezejaf.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/3b004a6757566b17987c5f7c78f8edc1/55732457556.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/05f51ceabc4643977b23cfe11bb0394f/kufofumi.pdfIn PDF document text
    • http://lnimeina.it/userfiles/files/koxeletibujopoditonefo.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/c5c5aedb54d140438c1a5184a47b1800/72705214508.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba9e3373494---76781236779.pdfIn PDF document text
    • http://3gr-group.com/ci/userfiles/files/jijovi.pdfIn PDF document text
    • https://bawaniint.com/ckfinder/userfiles/files/37867409444.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/16082a6ea0bb03---60997826844.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160bc54ecee2b6---66184263019.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093b2b794cd5---lojudamafepalexewoxumel.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=download+foxit+mobile+pdf+apkPDF 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_off0000e196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE196 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f9a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A8 17696 bytes
SHA-256: 5d7cb90a94a4def7b9356a74bfe0c5c199738cc05a68e17e503949a84db7df86
font_02_sfnt_off00012701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12701 10812 bytes
SHA-256: 5ad29debce1a07802b8ea08bc54827cbf41124388f2f41d5f8e6a927109d31ac

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