Malicious PDF — malware analysis report

Static analysis result for SHA-256 672c843ef80a7e93…

MALICIOUS

PDF

278.8 KB Created: 2021-06-29 22:59:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: bac1c9fbfd09ae6deeacec33cdddf43a SHA-1: 6173c30ea8d6433c3ae56f6b61eed8b50a88864b SHA-256: 672c843ef80a7e930230703fc3cf66774fc9041154ea08fb40fc184bf7dc7ea4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a malicious PDF detected by ClamAV and an ML classifier, indicating a phishing attempt. It contains numerous links to compromised WordPress sites, suggesting it's used to host malicious content or redirect users to phishing pages. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to exploit vulnerabilities or lure users into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9759

Heuristics 5

  • 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.
  • 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://icltindia.in/userfiles/file/12876136938.pdf In PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/5da20e30c599d915bf368bff5dd582fd/zomunapokadapedexinubafi.pdfIn PDF document text
    • http://sghscsjamarai.org/guruhargobind/userfiles/file/91027132030.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609c540ead17d---52360351290.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/wuvofikejipipodesabitebov.pdfIn PDF document text
    • https://aedwea.com/upload/foto/88625084121.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/a25c609cdda5e6ea46a52db9bfae4233/xopaluda.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-5-3/20210503011537350819.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3077708f4---44376149271.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///39845877745.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/2fee43e7eaddeb1df985c5a8565ceb35/171620483.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3e77960bd---sagiworoxomowapu.pdfIn PDF document text
    • http://dade666.com/userfiles/202106file/2021061912190070554.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/070159f3bd7a4df9dfdd7be430260c5f/davir.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160817593768f2---1166791574.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16076f55993ea1---tetafekutepowezaxod.pdfIn PDF document text
    • http://forumcutuca.com/ckfinder/userfiles/files/zutimobinubew.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/dc52add4720eaf8826860c7beb965eb9/lusezovisawisirum.pdfIn PDF document text
    • http://megat.pl/uploaded/fck_files/file/91082668516.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/2e4729bd8b344dfe96f10dc261362708/fewoj.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e0de29f32a---88973625690.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/8ce69cda73f8d3c08647d1d53879f883/luxonuwogoniko.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606e6bd3c82e5---xokuvax.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a09ec3346bf---fejobopimi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=all+about+gandhijiPDF 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_off0003e3f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3E3F2 10476 bytes
SHA-256: 8d3be4d5cd99a0385516c77b07b32b3bc3f6efc691d1629d5c4574b2bd067d6b
font_01_sfnt_off0003fb5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3FB5C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0004136e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4136E 23364 bytes
SHA-256: 65126f99f865bf784173a945fb1b0ea9974b0cecee79fa0f48a0135b42e58bf7

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