Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6267b3beb2cc5ed…

MALICIOUS

PDF

70.3 KB Created: 2021-09-18 09:44:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 95e3abaa916fce6bef30d3ce57356c98 SHA-1: 570cd4a92ede7048b7c8a79314c42407f29cc047 SHA-256: c6267b3beb2cc5ed264e4c4e5afd528f2b8b9b7fa393cc325d01af02af282dc3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. The PDF contains a large number of links pointing to disposable domains, a common tactic for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and link farm suggest it's part of a phishing campaign, likely using embedded JavaScript to facilitate redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://cavusofis.com/images_upload/files/51898316658.pdf In PDF document text
    • https://www.emcp-pmce.ca/_includes/ckfinder/userfiles/files/39395662014.pdfIn PDF document text
    • http://goodwill.pl/userfiles/file/jerixavuwuma.pdfIn PDF document text
    • https://slide-bearing.com/d/files/71698122773.pdfIn PDF document text
    • http://studiosantese.eu/userfiles/files/nejepuxesewu.pdfIn PDF document text
    • https://tl-systems.hu/files/files/26809465187.pdfIn PDF document text
    • http://turinimoti.com/assets/userfiles/file/87929767972.pdfIn PDF document text
    • https://pilot-nav.com/ckfinder/userfiles/files/pizoso.pdfIn PDF document text
    • http://cnokorea.com/userfiles/file/pozodubinadal.pdfIn PDF document text
    • http://massimosusto.eu/userfiles/files/32767039582.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/161444cde7945e---ripufimadaxokokef.pdfIn PDF document text
    • https://e-ceramika.pl/userfiles/file/gimabejajowuwuxap.pdfIn PDF document text
    • http://powerfalcon.net/uppic/files/8353794806.pdfIn PDF document text
    • https://wonwon.taipei/photo/file/bejokagopaze.pdfIn PDF document text
    • http://naturabliskociebie.pl/userfiles/file/jewiwafer.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/56b2t7pkce38d6ifpd2dspsu07/309017313.pdfIn PDF document text
    • http://asirakademi.com/resimler/files/69713529077.pdfIn PDF document text
    • http://ourpreferred.com/userfiles/files/83961999050.pdfIn PDF document text
    • http://dobre-jaja.com/Upload/file/61591681965.pdfIn PDF document text
    • http://viettranslators.com/webroot/img/files/92705622654.pdfIn PDF document text
    • https://nestsearch.in/admin/uploads/file/wawosewepawixe.pdfIn PDF document text
    • http://annabarons.lv/files/files/58607125831.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/tarij.pdfIn PDF document text
    • https://pointvirgule.ca/upload/editor/file/52949821245.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=speed+up+wifi+on+androidPDF 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_off0000b61e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB61E 10440 bytes
SHA-256: a0a3fff778aeec849d0026f3f0c21aeab1989ffc8fce9df399b8ff8ba76f717b
font_01_sfnt_off0000cdf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDF2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE604 15020 bytes
SHA-256: e525c3f0c8cd9785d39a649d78923e8f1740dc8f5faca4401296a905b1978777