Malicious PDF — malware analysis report

Static analysis result for SHA-256 574832913e7a4efc…

MALICIOUS

PDF

80.6 KB Created: 2021-09-24 00:08:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: bf82bb0fb1d6f0a92cd97892bcf2f061 SHA-1: 781c76843a699786dca8b28bf72f044f8ada0cfd SHA-256: 574832913e7a4efcf3ad2f4e3429292ece5bae99bbb1144ab19004ea09a12798
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to domains that appear to be part of a link farm, suggesting an attempt to direct users to malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a strategy to obscure the ultimate destination of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://joy05.com/_UploadFile/Images/file/jojug.pdf In PDF document text
    • http://optimumnieruchomosci.pl/uploads/userfiles/files/90447713503.pdfIn PDF document text
    • https://www.syria-report.com/sites/all/libraries/ckfinder/userfiles/files/mexino.pdfIn PDF document text
    • https://fiscconsulting.com/userfiles/file/dopir.pdfIn PDF document text
    • https://peintures-descours.fr/fichier/files/21160389187.pdfIn PDF document text
    • https://free-spirit-city.eu/uploads/wysiwyg/files/32828889594.pdfIn PDF document text
    • http://german-ex.com/images/blog/file/pasakarajufewinilupisubar.pdfIn PDF document text
    • https://fedico.ca/upload/editor/file/difofirodaxeratiwok.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d07b732edf---vovavesivagunexoxidasege.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613a79ff108c7---62370749825.pdfIn PDF document text
    • https://sklepbonus.pl/userfiles/file/veliwuzowo.pdfIn PDF document text
    • https://girisimhaber.com/uploads/file/35887534440.pdfIn PDF document text
    • https://oxi-dental.ro/imagini_ws/vofobixipizifabu.pdfIn PDF document text
    • http://smartickgroup.com/userfiles/jiwibop.pdfIn PDF document text
    • http://wingmanplanningdemo.com/userfiles/files/77231528651.pdfIn PDF document text
    • https://taxforce.nl/userfiles/files/94733636672.pdfIn PDF document text
    • https://atasuorganiktarim.com/upload/ckfinder/files/89450619797.pdfIn PDF document text
    • http://szigmetal.hu/editor_up/setotexudoxeguzi.pdfIn PDF document text
    • http://rainhouse.kr/data/editor/file/4933226133cc4f29348.pdfIn PDF document text
    • http://www.vegagastro.pl/upload/file/34797220464.pdfIn PDF document text
    • http://streathamtaxi.com/survey/userfiles/files/90508515937.pdfIn PDF document text
    • https://mobile-translator.eu/app/webroot/media/files/15207693097.pdfIn PDF document text
    • http://magic-mugs-factory.com/uploadfile/files/megewexixorekiwegati.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=java+binary+to+hexPDF 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_off0000d7b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC2 17516 bytes
SHA-256: e70e6c72e603ea206ae128ac60e88a559e3058fb790031e89d514a28735b98e1
font_02_sfnt_off00011da5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA5 10404 bytes
SHA-256: d0b367e2dd27af4ce503c6ff5c833cebaf91768d8528ab1c124aa011cdcbea2c

Open this report in the interactive analyzer, or submit your own file for analysis.