Malicious PDF — malware analysis report

Static analysis result for SHA-256 57b78eca043d21f0…

MALICIOUS

PDF

71.8 KB Created: 2021-06-21 00:03:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d02bbacd109b4b4fd02da6b967bd5b92 SHA-1: 91500130eca534009fd50fb0582d8cacce87844b SHA-256: 57b78eca043d21f0b54851fb89d6c1d7f275f9b31702307a6a85022812e0bcc1
96 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs pointing to potentially malicious PDF files, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the presence of embedded URLs and the overall detection verdict point towards a phishing lure designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160a151e817767---didilaroxetolekufavizeke.pdf
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca2c142a97---44444843264.pdf
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/c056e90fd31e31f913f115a8bbfe6505/wofujebodejoduderokepe.pdf
    • http://z500.si/files/36664485858.pdf
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160add4e00c8e5---lomada.pdf
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/2b7c92b342c7ff9b5e8c80aeb2f9aa58/20405610194.pdf
    • https://www.ideaklinik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160741a474fa51---61021495849.pdf
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/19dbba4a9150b196f894e7b332bccf2d/tezelot.pdf
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/8351e3288ffdec62e77be841216a2bd2/runadosigenesonexejubub.pdf
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c76c16e841---89697300801.pdf
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b8104859b---33347659628.pdf
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160710fb16762e---32746202067.pdf
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/a53b1873febbe4a97c3dfb9a94573948/6005276664.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=street+dancer+3d+full+movie+watch+online
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da7d.bin
d1f64db251ddccac984e7ce6eefda28e933ef8d92541cca92aeeb3d43ea8069b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA7D 5500 bytes
font_01_sfnt_off0000ed24.bin
74ea6ca1bab5f5b52dc4690ad4879722b6be5bed28547b1387382d92b28de1bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED24 11000 bytes

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