Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2bebb86c9655867…

MALICIOUS

PDF

68.0 KB Created: 2021-09-26 04:43:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07
MD5: 51d27880fc99d1674f9519f0bda06f6d SHA-1: 271d3a9c1cc9412ff35a3f6564c1c9a672543c04 SHA-256: e2bebb86c9655867803edb9ab9604c2d6165e8c84a3dd7c7223decdc366cbf01
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to malicious sites, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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://bilcafe.it/userfiles/file/lilojemajubotaxod.pdf In PDF document text
    • https://sensiblemachines.com/ckfinder/core/connector/php/files/zixovelezumoduzikodisevop.pdfIn PDF document text
    • http://www.atsamuihaus.com/image/upload/File/38200854813.pdfIn PDF document text
    • http://vasset.bg/userfiles/file/butawuzorado.pdfIn PDF document text
    • https://hunglivet.com/uploads/files/202109010711208249.pdfIn PDF document text
    • https://creteotels.gr/FCKeditor/userimages/file/63097717063.pdfIn PDF document text
    • http://clear-es.net/yamituki-n/uploads/files/79895920283.pdfIn PDF document text
    • https://illinoisfiscalpolicycouncil.org/app/webroot/userfiles/file/raden.pdfIn PDF document text
    • http://reylab.com/userfiles/file/xumebulajuzuxubol.pdfIn PDF document text
    • http://aqbnb.com/uploadfile/file/bovet.pdfIn PDF document text
    • http://easyliveconstruction.com/ci/userfiles/files/48344911707.pdfIn PDF document text
    • http://xutricolor.com/uploadfile/files/nabojofugiked.pdfIn PDF document text
    • http://m-s-g.ru/userfiles/files/30136030117.pdfIn PDF document text
    • http://surausa.com/uploads/files/tilezukedarumudakuwix.pdfIn PDF document text
    • http://cartopack.be/Images/file/69921057751.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/36c17553a066ad2fb6e9e4f0ba9f0f46/32793106448.pdfIn PDF document text
    • http://sxsasa.org/images_fck/file/1631353362.pdfIn PDF document text
    • https://akonis.ch/userfiles/files/38146671345.pdfIn PDF document text
    • http://ms2oke.com/contents/files/8236295827.pdfIn PDF document text
    • http://olympusflights.com/files/files/koruvagupawegovizepube.pdfIn PDF document text
    • http://mevlanaasm.com/resimler/files/10419588106.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=apk+friday+night+funkinPDF 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_off0000abdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABDD 15404 bytes
SHA-256: b0696591aa7326dee69d4cebcce40fa8103324d4e0f9d4e0ecd47b85a0223843
font_01_sfnt_off0000d2da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eaf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF1 10600 bytes
SHA-256: a7ce4a17f89c97213439aa70f96c3f9bd99d06dee86b406b602f90c15c22328f

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