Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbed24a30a81d6d1…

MALICIOUS

PDF

78.9 KB Created: 2021-07-16 01:38:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9e984841489b289716cdb2f8ccba99b0 SHA-1: c675fc0169796d4c5bfc50319eca5931125ddae2 SHA-256: dbed24a30a81d6d1b5f5a1f861ef2d3730f6f940d40108775f9d455acf2adb1f
156 Risk Score

Malware Insights

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

This PDF was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains a link farm pointing to multiple compromised websites, specifically targeting WordPress upload directories. The presence of numerous links on disposable hosting and the use of 'utm_term=proceed+with+the+meeting' suggests a phishing or social engineering lure to trick users into clicking through to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606e36cb72517---39975731030.pdf In PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a699a3b6af---37624865820.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/ba78f67e88d05129bfdee2d96eac6d48/nivugafuzirojura.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160803eb67d939---61036982264.pdfIn PDF document text
    • http://remont-elektro.eu/archiv/file/jebusuvebaziwe.pdfIn PDF document text
    • http://splogservice.ru/content/file/bejalaxafikuku.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1607e45b882a18---fivigefadoso.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/ad5a3301999901d90acd5f16ddfdf6f0/645220981.pdfIn PDF document text
    • https://palet-school.com/files/files/ditomewomofigasokugozupe.pdfIn PDF document text
    • http://lelit.nl/app/webroot/files/userfiles/files/wekotizojomivexewujilofuf.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/41083815167.pdfIn PDF document text
    • https://tkquiz.com/userfiles/file/17549114355.pdfIn PDF document text
    • https://linhquan-group.com/upload/ck/files/sotarijatafulatunata.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160868c1315ec6---panoloperezegomuforege.pdfIn PDF document text
    • https://conexkarvan.com/cache/fck_files/file/tewolabetovawuj.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160956db6b2ab8---11385235674.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/16083cd789bf0b---24649883674.pdfIn PDF document text
    • https://bonafideonline.com.ar/wp-content/plugins/super-forms/uploads/php/files/5076d3d424616164b0834894378235e8/66011893182.pdfIn PDF document text
    • http://thompsonhigh1980.com/clients/4/48/48b9e10b24f1ac3c627dfd5bb8c45987/File/pokogitefivugupav.pdfIn PDF document text
    • http://greenbiotech.vn/uploads/userfiles/file/94041600233.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d58703b3b7---27751323385.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/a126776b6ea7124d2b66fa1e0ca0b540/womabupuz.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/192bcdf71ffcd40b329b00ecc74ea2a7/82374118661.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=proceed+with+the+meetingPDF 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_off0000d37a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD37A 16696 bytes
SHA-256: c6bd01ad217f706e109d55c98ccb68802ad28f526727440c7e9f4676351ce5d7
font_01_sfnt_off0000ff04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF04 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001171b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1171B 10528 bytes
SHA-256: ff6525c4c25354ac6b604fa0dbd0f20ec8d8df497433d15a3275504726a99c04

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