Malicious PDF — malware analysis report

Static analysis result for SHA-256 5931bc69302ad274…

MALICIOUS

PDF

81.5 KB Created: 2021-03-14 12:10:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0dd039d226dd2270c15f320be12bb9f5 SHA-1: cefe8efcdf6450a180cd8663004850c72de94595 SHA-256: 5931bc69302ad274647162b0e1e0b9b492a5b5256aa5509ee825d578449c310c
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is likely intended to host malicious content or redirect the user to a phishing site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://jumiwimov.ru/strik?utm_term=the+expanse+season+3+episode+6+soundtrack PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369161/normal_603702c3b096a.pdfIn PDF document text
    • http://amsidgi.xyz/long_john_silver_meal_dealsz9h82.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414672/normal_6007d18b0fc26.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452381/normal_5fcad24e38a33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372985/normal_603c1654d43f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474176/normal_600a814c38563.pdfIn PDF document text
    • http://umdtheatre.ru/93569427381j2jyt.pdfIn PDF document text
    • http://top-odejda.com/asus_rt_n53_hard_reset2p6l4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393637/normal_600c7f7bdf34d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418566/normal_5feea55d2f17c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452851/normal_5feec8ed20442.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530868/normal_5fd6790606eb9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422372/normal_5fcc02cc9f380.pdfIn PDF document text
    • http://net-klientov.ru/vovijerorinuwizuxeuepl1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376598/normal_5fe4cab371237.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489404/normal_5fe49baa5ef78.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449630/normal_5feb15aa9a1e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448346/normal_603995c0071cc.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/169de5ad-b0f2-42c0-9376-81f098c1817a/what_is_the_goal_of_newspeak_1984.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5d4f41c-ee75-460a-9d75-f9aa401cfb6e/67001945193.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/abcd_movie_songs_free_in_telugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33d62801-9e0d-49a0-81c5-dfc8949d7b73/xidaridakowefav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee08114b-a944-482a-a57e-6b9944bf99c5/how_to_stop_cat_anxiety.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/how_to_read_a_rheem_water_heater_serial_number.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/kabupagaturog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d68a865-4179-4cff-a6b9-4a677a47a6f4/49109526117.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_off0000fe47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE47 5528 bytes
SHA-256: b5cc4b190d13c199b2eae3a611d37c11e1cf06d58749beb3da30d805bff1798f
font_01_sfnt_off00011106.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11106 11532 bytes
SHA-256: 90e29a1a8c2c5c26611370a2ab7058a3e59440cb173906fee2c9ab5ea9b9ce3f

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