Malicious PDF — malware analysis report

Static analysis result for SHA-256 de1219da46138bc7…

MALICIOUS

PDF

72.6 KB Created: 2021-09-16 02:45:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 35a4d0f5ce1ff9f732a47f1e52ba33f7 SHA-1: 0491eeb486b2ea72acefcb3dbd2ea0701fdb7543 SHA-256: de1219da46138bc7c5d839512963f7ec0df55ee2f0236a47ee1d42f80496bb45
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, suggesting it functions as a lure to phishing or malware distribution sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this by indicating the PDF is a link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 https://chcial.ru/uplcv?utm_term=watch+mortal+kombat+online+free+putlocker PDF link annotation
    • https://foodphotoshop.com/userfiles/files/womuvazimimesasi.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f2250a1bef---vixezalam.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/161426ae53d651---xiralelukemepafo.pdfIn PDF document text
    • http://chinajessie.com/seadata/data/uploads/img/file/163155404849.pdfIn PDF document text
    • https://sunsoftinfoway.net/ckfinder/userfiles/files/29613191554.pdfIn PDF document text
    • http://myphamasia.net/upload/files/nakuwinumugomunije.pdfIn PDF document text
    • http://pegastelco.com/pictures/files/41274090107.pdfIn PDF document text
    • http://ark-mr.com/data/home/qxu2063190031/htdocs/uploadfile/files/kotonesogepepusa.pdfIn PDF document text
    • https://jurvamartin.com/userfiles/file/figejajij.pdfIn PDF document text
    • http://www.medicellbank.com/userfiles/files/jebefovevajagumiduvedi.pdfIn PDF document text
    • https://doctmcooper.com/userfiles/files/vemojudativorujotalu.pdfIn PDF document text
    • http://bjsixiang.com/jingkelun/userfiles/files/20210912100217.pdfIn PDF document text
    • https://eko-briketes.lv/userfiles/files/xidapufurip.pdfIn PDF document text
    • http://www.uds-myanmar.com/image/upload/File/nagazusufalezopoxuzagel.pdfIn PDF document text
    • http://ansatrans.ru/admin/ckfinder/userfiles/files/kuvupasevu.pdfIn PDF document text
    • http://aibasavar.edu.bd/app/webroot/ckfinder/userfiles/files/foxevofisokobexoselata.pdfIn PDF document text
    • https://ags-car.60km.com/upload/files/13853637443.pdfIn PDF document text
    • http://kazuma.ru/ckfinder/userfiles/files/vamazojuminuxonawu.pdfIn PDF document text
    • http://security-m.jp/tool/images/file/pavuxewapamokibovuz.pdfIn PDF document text
    • http://24hnbc.com/assets/ckfinder/core/connector/php/uploads/files/47006235246.pdfIn PDF document text
    • http://kanoonkaraj.ir/dbmanager/filebank/htmlgallery/file///nitetabul.pdfIn PDF document text
    • http://fapannimario.it/userfiles/files/16714650706.pdfIn PDF document text
    • 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_off0000b8ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d0fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0FE 16652 bytes
SHA-256: 1085b0e11ccf5764d8b707026186097a90f2af4bee3c44ba49ed1ffe2613075b
font_02_sfnt_off0000fc11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC11 10900 bytes
SHA-256: ed09cb87556fa2f2a6e2018f7a558ba64f031257020961b4e839733b367d662f

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