Malicious PDF — malware analysis report

Static analysis result for SHA-256 62549f503bd03bfa…

MALICIOUS

PDF

77.4 KB Created: 2021-09-12 19:04:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9b97218c0e86dbb0db8122267fedf364 SHA-1: 69ea3637997921464ada5001768784b7d4e0b7c4 SHA-256: 62549f503bd03bfa5806b802bd0b91adc22ceb70f94ec16209b1570a30eb4fe1
174 Risk Score

Malware Insights

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

The file is a PDF containing embedded JavaScript, which is a common technique for executing malicious code. The PDF also contains numerous links to external websites, many of which are flagged as part of a link farm on disposable hosting, indicating a high likelihood of phishing or malware distribution. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • 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.
  • 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://studiotecnicomancini.eu/userfiles/files/56725869525.pdf In PDF document text
    • http://xn--72c7caerxx0d3a9eve.com/UserFiles/File/2588181055.pdfIn PDF document text
    • http://titusauto.hu/kepek/file/62136690712.pdfIn PDF document text
    • http://objets.immoweiss.lu/userfiles/files/fijuto.pdfIn PDF document text
    • http://geometrarontani.it/userfiles/files/xirepanosiwapokubeme.pdfIn PDF document text
    • http://jongauger.com/ckfinder/userfiles/files/81197011766.pdfIn PDF document text
    • http://hugslock.com/app/webroot/img/files/63786455297.pdfIn PDF document text
    • https://behbehaniprojects.com/uploads/files/25786105918.pdfIn PDF document text
    • http://amandatour.ru/js/ckfinder/userfiles/files/satipibiwudovurusovafive.pdfIn PDF document text
    • http://www.sudaff.com/pics/file/17686996380.pdfIn PDF document text
    • https://www.restaurant-latableedevercel.com/ckfinder/userfiles/files/ketalagokipazulogebizir.pdfIn PDF document text
    • https://cheeselicious.net/UserFiles/file/98136585480.pdfIn PDF document text
    • http://ticketsperiodico.com/galeria/files/wulakozoxor.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/mametokepezifomazobade.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/16138b8ffd2e17---42532959693.pdfIn PDF document text
    • http://nova-auto.com/upload/86755457742.pdfIn PDF document text
    • http://jamesandsons.ca/userfiles/file/voguditame.pdfIn PDF document text
    • http://businessnavigator.in/ckeditor/uploads/files/78946710122.pdfIn PDF document text
    • http://foodchemsino.com/d/files/begid.pdfIn PDF document text
    • http://nc-israel.ru/upload/files/gibexoxonulawepurixuvur.pdfIn PDF document text
    • http://giasuthienphuc.com/Images_upload/files/womuratisumawodesidupet.pdfIn PDF document text
    • http://belean.pl/userfiles/file/fadujaxom.pdfIn PDF document text
    • https://stthomasorthodoxchurchsouthpampady.com/userfiles/file/mutafodu.pdfIn PDF document text
    • http://kkagro.com/media/images/upload/file/gebazujukirif.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=madea+family+reunion+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_off0000c842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC842 17728 bytes
SHA-256: 648c68bde45cc6517f9d545160a47606ecd3433b36deca8c43295c308fd1a1f7
font_01_sfnt_off0000f68d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF68D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA4 11036 bytes
SHA-256: cbfd4491aa62631ff3f3eee4fe0d189273eb94e6de4d0ee75cc8c33c7ab4d6ed