Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5ecfbeff53d3e2b…

MALICIOUS

PDF

75.1 KB Created: 2021-06-05 02:37:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 6b0e101fdf10851cd336d55291b04523 SHA-1: 20886d0f2d783c65c6a893f7f4695cf466d2515d SHA-256: d5ecfbeff53d3e2ba2ddf30ae55c5d00bee8a2303eb5fff466349e9ee193c6ef
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URL pointing to 'archism.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to be a lure related to coupon codes, aligning with common social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 https://archism.ru/pbw?utm_term=pit+stop+racing+manager+coupon+code PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4458404/normal_6045bef18bb2e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474222/normal_60046f222d8c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386084/normal_6038ea1d754b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391649/normal_60295eac66479.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459787/normal_5fecb8a35f7f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448345/normal_602438eaed157.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420454/normal_6055572b889e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402246/normal_601a8292e867a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/67cd0bbb-63df-484b-af8d-cb9d2d74d3aa/97353528535.pdfIn PDF document text
    • http://mujefapufefi.pbworks.com/f/analisis_psicologico_de_la_pelicula_frozen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfe9743a-0db4-4b03-9aa2-42d53d8260b6/why_is_my_dog_chewing_his_bottom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db2dc429-fa12-4f20-bad6-9f29b7cbce9b/the_confidence_gap_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/366f30ed-f69e-4b35-865a-5ae6d067064d/1972_cessna_182p_parts_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0408cdf8-60ac-443d-b018-7183f67717d7/refarutimuzigefiwob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0523b1eb-9e68-4aa3-a47e-947f56502b65/700131918.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12fafc18-9f48-486b-ac77-9325ce1c5b15/kwese_iflix_app_free_download_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15fce30d-553a-464a-932d-b04dd7b297fc/legend_of_korra_art_book_3.pdfIn PDF document text
    • http://wikitaxif.pbworks.com/f/how_to_draw_line_in_excel_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c744838c-faf0-41be-b030-be4a36b6d022/felibibabekifop.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DC 5364 bytes
SHA-256: 0d2ae1fd90c4c61ffea301ab49f8dec9fecf7455ccb802637419264b0ae3def0
font_01_sfnt_off0000f9fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FE 10820 bytes
SHA-256: bbad928c4a7ac51fa2350152ceac8a026210689252edf5fd5fbf22019cae8764

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