Malicious PDF — malware analysis report

Static analysis result for SHA-256 20451e501d1eea46…

MALICIOUS

PDF

75.3 KB Created: 2021-03-13 18:27:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db89a0b5ec257b05efe679a015f35c79 SHA-1: 1eb526926540ae0bce340e8474762789553ef167 SHA-256: 20451e501d1eea4633cdf3f0f5eee9d8ae356a99fd34fc152b6c660a0f7bb134
96 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as 'Pdf.Phishing.Trojan' and a machine learning classifier with high confidence. It contains an embedded URI pointing to 'https://soxebez.ru/123?utm_term=sarainodu+audio+songs+free++naa+songs', which is likely the primary lure. Although no scripts were explicitly extracted, the PDF format itself can embed JavaScript, and the presence of a malicious URL strongly suggests a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://soxebez.ru/123?utm_term=sarainodu+audio+songs+free++naa+songs
    • https://cdn-cms.f-static.net/uploads/4368487/normal_60257a413c726.pdf
    • https://static.s123-cdn-static.com/uploads/4373782/normal_60098cafb4abc.pdf
    • https://cdn-cms.f-static.net/uploads/4408991/normal_6026c4e57c381.pdf
    • http://bezprovodov.guru/how_to_draw_books_for_13_year_oldsc53sq.pdf
    • http://koprovk.xyz/solefisujojimajigetycrty.pdf
    • https://static.s123-cdn-static.com/uploads/4421940/normal_5ffbbf51ec0c8.pdf
    • https://static.s123-cdn-static.com/uploads/4368492/normal_5fec4673473f9.pdf
    • https://cdn-cms.f-static.net/uploads/4421224/normal_600b4c9837a02.pdf
    • https://cdn-cms.f-static.net/uploads/4376856/normal_6048ead9d142b.pdf
    • https://cdn-cms.f-static.net/uploads/4445889/normal_5fe762b18c505.pdf
    • https://static.s123-cdn-static.com/uploads/4482629/normal_5ff16cf031cfd.pdf
    • https://static.s123-cdn-static.com/uploads/4459926/normal_5fc5c924460ab.pdf
    • https://cdn-cms.f-static.net/uploads/4386361/normal_5fd32062e5dfe.pdf
    • http://astrology-personal.online/right_to_information_act_amendment_2019_upsc14nl0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/aef654b2-e89b-4b64-bc02-63b322ae9f18/divozalipe.pdf
    • https://uploads.strikinglycdn.com/files/a2f75c13-58ec-4b3b-89b8-ab1333164953/86359636564.pdf
    • https://s3.amazonaws.com/dowesitobuga/the_hardy-_weinberg_equation_pogil_answer_key.pdf
    • https://s3.amazonaws.com/fejififimaketo/98763046794.pdf
    • https://uploads.strikinglycdn.com/files/b306afb0-c4ae-4f97-91b5-3c4f0b70894e/xuzizozujatusowuzunibi.pdf
    • https://uploads.strikinglycdn.com/files/9eb40f47-e02e-4f44-a482-cf0ce04f50db/potelitoxute.pdf
    • https://s3.amazonaws.com/lusabifef/85368793977.pdf
    • https://s3.amazonaws.com/legobegutulo/fexazajuduwamuxe.pdf
    • https://uploads.strikinglycdn.com/files/5f5c5922-0daf-416d-8b76-0a4355350f4d/what_countries_are_in_world_zone_3.pdf
    • https://s3.amazonaws.com/dazuxujepov/the_fall_guy_tv_show_netflix.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e682.bin
f29ee44e04e07d238a3ee01ada289d8f417855d0e0f2ba50cf9cef778308bf4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE682 5148 bytes
font_01_sfnt_off0000f80d.bin
eebcd554a7e1b6899912d81f0a1482995e1d64b60df5fda97b37d6b08200bae5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF80D 11036 bytes

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