Malicious PDF — malware analysis report

Static analysis result for SHA-256 cce96b8f297df409…

MALICIOUS

PDF

69.2 KB Created: 2021-09-26 16:47:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 3572922e28eb1cb2ee3830bc8d803d36 SHA-1: e7b683b3d736239b5aef24a9a9576cb35fef8420 SHA-256: cce96b8f297df409aff031a26d8458f5f6eb47ba150ca2fb673a034670a90d11
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically identified as a phishing trojan. It contains numerous embedded URLs pointing to a link farm, suggesting an attempt to redirect users to malicious content. While no scripts were directly extracted, the PDF structure and heuristic firings indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://almentispharma.com/ckfinder/userfiles/files/fikisu.pdf In PDF document text
    • https://littleedupark.com/ckfinder/userfiles/files/40755900950.pdfIn PDF document text
    • http://arabstina.com/ckfinder/userfiles/files/gemozagabegevofijomokal.pdfIn PDF document text
    • http://lavalnerina.com/userfiles/file/zumevubipivulak.pdfIn PDF document text
    • http://uteambio.com/upload/files/rizirovokevedimalolo.pdfIn PDF document text
    • http://ericshartman.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/24400784968.pdfIn PDF document text
    • https://gulamanis.com/contents/files/jagatijenib.pdfIn PDF document text
    • https://stallion-international.com/userfiles/file/tojetefewexalaxivimib.pdfIn PDF document text
    • http://computergramm.com/userfiles/file/10051471639.pdfIn PDF document text
    • https://ottopianos.nl/files/diredoxenujotuga.pdfIn PDF document text
    • https://dansobentre.net/uploads/file/zewezebudukujo.pdfIn PDF document text
    • http://nayyaralidada.com/alpha/ckfinder/userfiles/files/nimazapufizatagibumup.pdfIn PDF document text
    • http://fcraregistration.com/UploadedData/file/fafegagolosimo.pdfIn PDF document text
    • http://stellarp.com/userfiles/files/rumufakomagalile.pdfIn PDF document text
    • https://www.jancsoalapitvany.hu/ckfinder/userfiles/files/labajom.pdfIn PDF document text
    • http://dostrojar.sk/UserFiles/file/98085992157.pdfIn PDF document text
    • http://sasolution.kr/userfiles/file/433177409.pdfIn PDF document text
    • https://leanuslab.com/UserFiles/file/22410504115.pdfIn PDF document text
    • http://ttfi.org/app/webroot/userfiles/file/65518557232.pdfIn PDF document text
    • http://www.luna1956.com/images/library/File/65604633512.pdfIn PDF document text
    • https://airxps.com/userfiles/files/60607768052.pdfIn PDF document text
    • http://lachambredechos.com/userfiles/file/gedikugiteminamitilaseji.pdfIn PDF document text
    • http://mastervgtour.by/var/upload/file/tidafolowemizabi.pdfIn PDF document text
    • https://mcsfood.com/images/file/3392982105.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=gmod+apk+download+androidPDF 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_off0000af2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF2C 15956 bytes
SHA-256: d8d377f13624855e7dee33ce9f9c5fd36a4802aead774c5fe317e388a2ef1d45
font_01_sfnt_off0000d79e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD79E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000efb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB5 10372 bytes
SHA-256: c9e2c94c4530a3e3595ded1acd894fa94ce4b501c076ae34ce27e0470e02c97a

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