Malicious PDF — malware analysis report

Static analysis result for SHA-256 b36f06c5db5ff40b…

MALICIOUS

PDF

84.2 KB Created: 2021-04-01 21:27:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 583224fc76e260f6b1ea3468c562e21c SHA-1: d472b7dbaef5d9f704ebda98f6418a0acc778fb5 SHA-256: b36f06c5db5ff40b1d511123cc9b24e8abee305c6b3eb2eff7767fdc96865d0b
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating phishing and malicious content. It contains numerous external links, including one pointing to 'seumenha.ru', suggesting a link farm or phishing lure. The document body, though heavily obfuscated, appears to contain keywords related to medication administration, likely as a pretext to drive traffic to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/award?keyword=8+rights+of+medication+administration+pdf
    • https://static.s123-cdn-static.com/uploads/4369158/normal_5fd05c479e97c.pdf
    • https://static.s123-cdn-static.com/uploads/4386622/normal_6001c4283e298.pdf
    • https://static.s123-cdn-static.com/uploads/4475852/normal_5ff8d5c8493ae.pdf
    • https://static.s123-cdn-static.com/uploads/4411691/normal_5fcebefdedcaa.pdf
    • http://memisada.mygamesonline.org/filinumus.pdf
    • https://cdn-cms.f-static.net/uploads/4448539/normal_6046691265614.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/fee84396-8769-4a08-b717-fe616ca6262e/metal_gear_solid_4_rpcs3_config.pdf
    • https://s3.amazonaws.com/bofake/12950398723.pdf
    • https://s3.amazonaws.com/zemigiduwagafu/39232573117.pdf
    • https://357b8bef-7330-4cfe-b31d-389db25c4d5a.filesusr.com/ugd/4c76bf_cc689a87bcbe43498e350ef44a2f923f.pdf?index=true
    • https://cb38ef3f-1f2c-4622-8962-dca261660167.filesusr.com/ugd/3ae201_a74eed4a2ba94fd490a712e4bae80a8d.pdf?index=true
    • https://d56a38bf-d62e-453c-9b5b-5b2fe88aea46.filesusr.com/ugd/359e64_0bf5ab9e0d6b4b3c9995c8b439000a51.pdf?index=true
    • https://79e8b926-cc52-4cef-90ae-68e3990d752e.filesusr.com/ugd/694d5d_8fd200844f334ed2aab12d9a00535635.pdf?index=true
    • https://c216880a-03a2-4774-ab7e-121c93799e8f.filesusr.com/ugd/b5aed9_a737bb3b23094469b8b1ee7afe24f4b9.pdf?index=true
    • https://uploads.strikinglycdn.com/files/276f3bab-e2e7-48a7-848a-4d1ef812705f/mokofunaguzurenirib.pdf
    • https://7aff118d-26f6-4d76-9bc9-1838009e7274.filesusr.com/ugd/f80014_0d3554523cef4c8fbdf303a6b23007e9.pdf?index=true
    • http://mepitar.atwebpages.com/jimutikulugexem.pdf
    • https://6f672a44-e16c-4921-a0f1-e3781c0647c5.filesusr.com/ugd/bda22a_7b57318f293e46ee8fa4f581d7760214.pdf?index=true
    • https://s3.amazonaws.com/lokijuronig/surar.pdf
    • https://113c517c-d7b0-4b36-99d7-6722bcb7ef36.filesusr.com/ugd/8e66a5_c7de44af52544f2281972e7f81858162.pdf?index=true
    • https://45b0b119-5f8c-43e7-b437-4e12d17c1c81.filesusr.com/ugd/3826db_a5b7a591f37b46f282355a4dd058bef6.pdf?index=true
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e171.bin
6409febaa6f78f0f225445d0c141c0fb307c89edabeb042627843bce086a7cd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE171 5424 bytes
font_01_sfnt_off0000f3af.bin
933d6f08b9747c2450edfd06978f9a06c037a3cc03c42207a1343c5c6058dbf5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AF 13056 bytes
font_02_sfnt_off00011dc8.bin
c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DC8 16204 bytes
font_03_sfnt_off000132f7.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x132F7 4324 bytes

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