Malicious PDF — malware analysis report

Static analysis result for SHA-256 292ba8d011675482…

MALICIOUS

PDF

82.0 KB Created: 2021-08-24 00:26:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1380d1e043ea1e318ee24ce0ed981a35 SHA-1: a3b83b6e0ddde2b4cb5ca7ba1c60cdae4be42dd5 SHA-256: 292ba8d01167548202cde6283e63723629a813a898fede97a29dd0aa82399053
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, hosting numerous URLs on potentially compromised or disposable domains, designed to redirect users. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's part of a phishing or malware distribution campaign, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9f8474034a---14838653736.pdf In PDF document text
    • http://northwestpixie-bobs.com/clients/e/e1/e1941a3904c49320334fd90e0ed9e852/File/82083449005.pdfIn PDF document text
    • https://willmarlakesarea2040.com/ckfinder/userfiles/files/78402314628.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/eip3ufgj3lgdagfssk9fvrisf2/28267725612.pdfIn PDF document text
    • http://bhavalaya.org/ckfinder/userfiles/files/muboferu.pdfIn PDF document text
    • http://aimic.com/userfiles/file/21091809832.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16081fe2e051c1---xolirojibakidovimat.pdfIn PDF document text
    • http://lawyermo.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sowanino.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/alrci59hnoq01ak7p05mr8jb6p/vizodis.pdfIn PDF document text
    • https://markeishahall.com/wp-content/plugins/super-forms/uploads/php/files/2d24632ca81e1b34c543f0c20411a414/87618944150.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/1ed0519ab2fc2be5ba1ffb832afc3310/20379679220.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/54545791931.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/4a22e4ae1937c7afb3a133cc7843c4ab/40974352737.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/s157kpeab7ip60sodvn7rqpunh/wixil.pdfIn PDF document text
    • http://webinaris.net/ckfinder/userfiles/publics/files/latarekiwinepuvavobopom.pdfIn PDF document text
    • https://assignmentmart.com/ckfinder/userfiles/files/pugelafe.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160b5fac768128---28505629410.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/vatuwuj.pdfIn PDF document text
    • https://nstoplana.rs/ckfinder/userfiles/files/37534916743.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/63d81b4db17b9a51d32bf55aa5f2a45d/joxin.pdfIn PDF document text
    • http://studiogallerani.it/userfiles/files/3515014654.pdfIn PDF document text
    • http://kroonzuivel.nl/ckfinder/userfiles/files/xisubikaraxu.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6d099dd6b---38960793957.pdfIn PDF document text
    • http://betheaskssd.com/flash/betheaskssd.com/file/pipobagerinur.pdfIn PDF document text
    • https://www.liftechforklifts.com.au/application/third_party/ckfinder/userfiles/files/25564747547.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=watch+princess+protection+program+full+movie+online+for+freePDF 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_off0000da87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA87 11088 bytes
SHA-256: 2dcf701d71486a941dd76dd9b11a4eae7844262d4b82f62c54a6bf9e9ce1d47b
font_01_sfnt_off0000f43c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF43C 17288 bytes
SHA-256: 6aecd8f3713725a32357abc889a348584ae8697e2f350103383bde7238790086
font_02_sfnt_off00012177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12177 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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