Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9e66e9b24fcec2c…

MALICIOUS

PDF

78.3 KB Created: 2021-09-18 13:56:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d2743a30d189ab6cde1bbc2d5f9be9ac SHA-1: 4616bca6390910fad06ccb82cf74a992091699c9 SHA-256: e9e66e9b24fcec2cfcaa51662e5d48ffd2f15fd84bab08620e0515b8c203c7ee
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs that form a link farm, many pointing to compromised CMS uploads or disposable hosting, suggesting an attempt to redirect users to malicious sites. The presence of 'utm_term=favorite+betting+tips+apk' in one URL indicates a lure for potentially unwanted software or phishing related to betting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 7

  • 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.
  • 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 https://pistant.ru/uplcv?utm_term=favorite+betting+tips+apk
    • http://tc-antey.ru/uploads/files/raduvazibopobevufata.pdf
    • http://obras.ru/sites/default/files/uploads/volufinebefonirizetemag.pdf
    • https://accu-split.com/userfiles/files/38290635726.pdf
    • https://totalsewa.com/userfiles/file/jugufakizupowigeta.pdf
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/a7a6b5fe42973aaad6a6c8d594253e7d/34424997971.pdf
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613bbde2116fe---kemaduju.pdf
    • https://motty-etai-sharon.com/files/files/litodipuwalijekulofubowaz.pdf
    • http://cochemical.com/upload/files/diwabagisaleperiz.pdf
    • http://jessie.vn/images/ckeditor/files/98607731868.pdf
    • https://optical-axis.com/uploads/files/202109102017598291.pdf
    • https://asiantms.com/ckfinder/userfiles/files/detor.pdf
    • http://chinahongji.com/d/files/2644597607.pdf
    • http://anipetkingdom.com/webroot/img/files/dosusepolepakutiged.pdf
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/zujatasotesebemipak.pdf
    • http://idrogastermoclima.it/Utentifile/FCKPage/file/mubinutedajebogepol.pdf
    • http://sevennews.com.br/ckfinder/userfiles/files/xananetonifo.pdf
    • http://auxerretv.com/content/public/file/bizozeredowulizikesa.pdf
    • https://12waktu.com/contents/files/54218907092.pdf
    • http://kfnmdg.com/upfolder/e/files/20210913213559.pdf
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613de4fb6c513---17229811562.pdf
    • http://pnlestari.com/visitbali/image/files/lawafixoxitubiwude.pdf
    • http://postelezmasivu-brno.com/ckfinder/userfiles/files/sararebed.pdf
    • https://www.theknowledgeonline.com/files/lib/ckfinder/userfiles/files/36079708312.pdf
    • http://abwjefferson.com/uploads/files/10025997842.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ced2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCED2 16792 bytes
font_01_sfnt_off0000e6e9.bin
46de1b19fdcf187a3c5d798a8231062260904cda9f0d0bb1e3f010a82c57f290
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E9 10656 bytes
font_02_sfnt_off0000ff45.bin
353935d903394ace57985e0f29ed39571d2138ab6c186350538067de7c95b3d4
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF45 17336 bytes