Malicious PDF — malware analysis report

Static analysis result for SHA-256 e968a1fee1c2dd56…

MALICIOUS

PDF

83.9 KB Created: 2021-09-04 18:54:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e9045d270af3e0b6e2650c3320c87825 SHA-1: dbf05e7c685be1213b19462c4744f43ec914750c SHA-256: e968a1fee1c2dd56c1b57a959b41540fe4e07ef835309ba2d4b23abe662540c9
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads, indicating a malicious intent to deceive or infect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a777c670cd9---36018659348.pdf In PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c23342e8416---wevokawexeme.pdfIn PDF document text
    • https://soalmatematik.com/userfiles/file/89584258534.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd93ad4d63---34861849056.pdfIn PDF document text
    • https://gikguamerica.com/userfiles/file/rufogekepi.pdfIn PDF document text
    • https://hanahana.vn/media/ftp/file/87251050968.pdfIn PDF document text
    • https://feng-shuiworld.com/userfiles/file/76772072520.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/uqkvtaiosrgk0j62aikmd2tu2d/vasujenaduremelopuzukuze.pdfIn PDF document text
    • https://am-system.eu/ckfinder/userfiles/files/darofim.pdfIn PDF document text
    • http://lose-weight.tw/upload/files/dewunareguwobelos.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/60b4d02605159d014d4d19af0be62fed/bixesogenekev.pdfIn PDF document text
    • http://etkenkalip.com/CodeignterProject/vizyon/files/zabotevadamepoxifij.pdfIn PDF document text
    • http://haiqi-machine.com/d/files/vulabajo.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070ee5914c19---74220568537.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/91ae755ffa5818445d3a81bfb2fa585f/zopozomunej.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/cb9a0lqrhd30ls1v5vnvqfo1r2/97735025179.pdfIn PDF document text
    • https://careersourcechipola.com/files/public/40589218961.pdfIn PDF document text
    • http://nocleginaplus.pl/uploads/userfiles/files/mosawezuzenusiju.pdfIn PDF document text
    • https://novahealthclinic.ca/userfiles/file/gopiliteruwitu.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/18b550b8ba42fd098c202aa8593d4e85/xusibuzekojajon.pdfIn PDF document text
    • http://vyveva.eu/UserFiles/File/ponatemikevewibabi.pdfIn PDF document text
    • https://sunrise-photon.com/upfiles/editor/files/lodajo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=desktop+motherboard+schematic+diagram+pdfPDF 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_off0000e15d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE15D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f974.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF974 11148 bytes
SHA-256: 77da47e9871fe0f5df2127fb7a8e511b0fefe5ab17be36005b9957b489a69550
font_02_sfnt_off0001131b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1131B 18160 bytes
SHA-256: 4caa7b3d31cd49e64293e9db18e6d961aa99edc0b5e557d30a08c8b2d11ec7a2

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