Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2e0e6abe16636ee…

MALICIOUS

PDF

84.8 KB Created: 2021-09-22 14:21:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f15f876ec834f09e0e872537af9f4086 SHA-1: 6b0908328e54ecf2084369a2937511e4acc915d9 SHA-256: d2e0e6abe16636ee3e852c03070cc3e44e72b779abce1af5a33b322f018a702d
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many hosted on compromised or disposable domains, indicating a phishing or malware distribution attempt. The 'SE_INVOICE_LURE' heuristic further suggests a pretext for the user to interact with these links. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://allytemp.ru/uplcv?utm_term=show+me+all+my+apps PDF link annotation
    • https://evpersoneli.net/ev-personeli/file/zarirusopipagurumaren.pdfIn PDF document text
    • https://agronlogistics.com/userfiles/files/kepitenimomubadevo.pdfIn PDF document text
    • http://memsports.com.br/admin/libs/ckeditor/ckfinder/files/96813904208.pdfIn PDF document text
    • http://fuzoku-kyujin.jp/ckfinder/userfiles/files/gapufiligibeloba.pdfIn PDF document text
    • http://parentini.it/userfiles/files/1110496614.pdfIn PDF document text
    • https://serihosting.com/calisma2/files/uploads/96052199147.pdfIn PDF document text
    • https://magatek.com/documents/file/kaded.pdfIn PDF document text
    • http://kgmda.com/upload/files/rolutagozek.pdfIn PDF document text
    • http://www.thegrcinstitute.org/app/webroot/js/ckfinder/userfiles/files/34557224751.pdfIn PDF document text
    • https://halead.com/uploadfile/1631748025.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/74ca77d83199d43e7110b2ecb40576eb/lunixu.pdfIn PDF document text
    • http://krakow4you.pl/krakow/files/deduviro.pdfIn PDF document text
    • http://nhadep30giay.com/uploads/image/files/kijejexo.pdfIn PDF document text
    • http://lamarchesainterita.be/lamarchesainterita/imgdb/news/files/90809388766.pdfIn PDF document text
    • http://orkoien.com/userfiles/files/zukeguralevikanakagede.pdfIn PDF document text
    • http://yuqiaohome.com/uploads/files/202109082005173910.pdfIn PDF document text
    • http://ryouhurt.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/27554824472.pdfIn PDF document text
    • http://squash-fitness.cz/userfiles/file/tukukikatirebokesipota.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/c44a107c3276347fdfd8915231d54a00/82824291796.pdfIn PDF document text
    • http://jsdarvin.com/files/60885767550.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/09a160dc581fd118073c0194d312df09/nonomibinokizarural.pdfIn PDF document text
    • https://saikekanglun.com/filespath/files/20210915153500.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_off0000e61e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE61E 10396 bytes
SHA-256: 4baae39ce749ceb10f96ba4b60868c9b9cbf2310b1fd68097d95e9e24a6cbd5e
font_01_sfnt_off0000fdba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBA 18460 bytes
SHA-256: a55116b77dc1f6ad61a20afb3b2e0e092f77e6ff0037e79ec5b88bf4fcc25b36
font_02_sfnt_off00012db6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DB6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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