Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e2b6beb9d095d4f…

MALICIOUS

PDF

85.9 KB Created: 2021-09-17 16:58:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ee2121c830f6263142d76833e4889d67 SHA-1: c97b6afba9c822fd932e008f5999313242294f45 SHA-256: 3e2b6beb9d095d4f11a856cc50d36e695064316e588688da91ae180813d226a4
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to suspicious domains and are part of a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of a 'download' button heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jingkangchem.com/upload/files/9050571837.pdf In PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/6c55c287dd93657d862cdc510c1e65cd/poviwanafovuganozeme.pdfIn PDF document text
    • http://canhtoanland.com/upload/files/zipufesitozeloju.pdfIn PDF document text
    • https://zahrek.com/userfiles/file/51817405508.pdfIn PDF document text
    • https://samuelben-horin.com/userfiles/file/18122788554.pdfIn PDF document text
    • http://herium.net/FileData/ckfinder/files/20210917_37D987909F4F492F.pdfIn PDF document text
    • http://lerucherdesanges.fr/userfiles/file/nakigasisejimowabadoke.pdfIn PDF document text
    • https://kaptenhoki.info/contents/files/vigosexanejiwexisutudom.pdfIn PDF document text
    • http://punaide.com/userfiles/files/zuwaxifulasaz.pdfIn PDF document text
    • http://blpest.com/UserFiles/file/selokewefepifizagunifama.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/140056455306.pdfIn PDF document text
    • https://kocarbon.vn/luutru/files/44636752101.pdfIn PDF document text
    • http://xn--989ap7r0xbd5x.com/upload/fckeditor/file/81994138017.pdfIn PDF document text
    • http://taiwanquinoafamily.com/shopadmin/upload/files/zenofajameliziram.pdfIn PDF document text
    • http://ozdesignhouse.com/app/webroot/uploads/files/navotojozemezi.pdfIn PDF document text
    • http://wpklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pevimifexezoxotekezunobir.pdfIn PDF document text
    • https://jensbrode.de/files/file/51423258663.pdfIn PDF document text
    • http://itps-group.com/uploadfiles/file/wenivorikikuvepa.pdfIn PDF document text
    • http://ipceurope.eu/assets/file/lasubaletaxabisoguwarod.pdfIn PDF document text
    • http://vinhhangvien.com/upload/files/83761291216.pdfIn PDF document text
    • http://prunay-en-yvelines.fr/ckfinder/userfiles/files/rubapanul.pdfIn PDF document text
    • http://apex-architect.ru/images/file/42840109566.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1613dab0b17253---dokodi.pdfIn PDF document text
    • http://jtylek.pl/Upload/file/84400741639.pdfIn PDF document text
    • http://0975811252cool.linker.tw/files/vagerilobekujudidupunuju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=sub+rosa+2014+movie+watch+online+free+123moviesPDF 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_off0000e67c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE67C 11612 bytes
SHA-256: a031db37dc9b96f8d0dfc0fb7e95ecca8fab6a0b1e473b4ac4e59bc91c3fbdb7
font_01_sfnt_off00010214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10214 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011a26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A26 18240 bytes
SHA-256: 5acfb01a6b1358723c7295d1a31048a75a6a72b0a263e9ad5cd48ebcc382133a