Malicious PDF — malware analysis report

Static analysis result for SHA-256 0258d06517510083…

MALICIOUS

PDF

86.1 KB Created: 2021-07-21 17:00:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c0616cdeed2008de2c543a4116c66dfa SHA-1: 25aa8aa169c7e79c4af91e36fb37623a259e7796 SHA-256: 0258d06517510083568a664884aa6bbf6eadca036de491b538e77688b25ad0ad
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document flagged as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, 'nomylo.ru', which is likely used to host a phishing page or distribute further malware. The PDF structure and embedded content suggest an attempt to trick the user into visiting this external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://nomylo.ru/square?utm_term=10000+eur+to+usd
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f24eefde9f7d6ab7b17a7c/1626492655623/write_a_paragraph_proof.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec936e1996685841a9fbac/1626116974412/sudsational_launderettes_and_laundry_services.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee1f907c5bce1f334aa6a1/1626218384380/70356647874.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f287566c177f33d79a2008/1626507094743/zumemugew.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60efd826fd683a7867c870f5/1626331174323/resugoxaka.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e793208ad60325f0c2085f/1625789216331/must_and_have_to_exercises_with_answers.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f607b6d6771864a9c20bfb/1626736567073/gipubetuso.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f091579ddd2b2703197d90/1626378583641/28860665668.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f7c1f8eed4b36744477bf8/1626849784530/72196927236.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60edd41ce635d7166460a7b7/1626199068166/melting_point_for_ionic_compounds.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f5557626c2747482f78769/1626690934461/watch_lego_movie_free_online_streaming.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f756488efec7202ee41d7d/1626822217022/47866248655.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f515e2ce637c25834e8e02/1626674658930/jevisabuxe.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60eda264881afe0f0cec4e2f/1626186341533/gta_6_game_download_for_android.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f316caa9adb72803a3cd7a/1626543818556/god_is_a_prayer_answering_god.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60eda96c37bfc37e3c244745/1626188140639/lidaripezejazix.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e88e4f0eaa7c19c9d72fa1/1625853519755/xubosopewesejinodaj.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f77e08592bc62482eb0af1/1626832393125/babylon_pictures_today.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee5248c27d1e40a54bb982/1626231368577/how_to_add_picture_on_word_document.pdf
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed1d.bin
835e94f8033727cc847706eeaa8f7c88d096d65929406dc409533220abfafc53		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED1D 17548 bytes
font_01_sfnt_off00011b2d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B2D 16792 bytes
font_02_sfnt_off00013344.bin
6db6158b95587166eae8280839cbd41b092d7adc7bf9d1110fc0fe0488c3f680		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13344 10012 bytes

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