Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7d11d2a592a0736…

MALICIOUS

PDF

85.9 KB Created: 2021-03-09 03:00:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 496d6b34512e7b284075425cb6a4ac3c SHA-1: 7d34103da4c937e40ae9587486878594b7fa489a SHA-256: d7d11d2a592a073604e6b49588d36622d8e0a7bd808b5543b283289b53a36d65
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URL pointing to a suspicious domain, identified by heuristics as an external URI and an embedded URL. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jacksth.ru/strik?utm_term=how+to+use+behringer+xenyx+x2442usb
    • https://cdn-cms.f-static.net/uploads/4488592/normal_6039f9b4c15d1.pdf
    • https://static.s123-cdn-static.com/uploads/4369922/normal_5fe45f67eba8c.pdf
    • http://delojenopow.66ghz.com/functionalist_theory_in_anthropology.pdf
    • http://yewes.space/how_to_add_a_collar_to_petsafe_wireless_fence35jbp.pdf
    • https://static.s123-cdn-static.com/uploads/4479942/normal_6000ff53a9adf.pdf
    • http://gotesesevuzi.iblogger.org/lattice_method_addition_worksheet.pdf
    • https://cdn-cms.f-static.net/uploads/4469370/normal_5fe92eef74cab.pdf
    • http://zofekapa.iblogger.org/9536268821.pdf
    • http://naturmilans.fun/68859274172pk3hc.pdf
    • https://cdn-cms.f-static.net/uploads/4385647/normal_5fd330b053ee9.pdf
    • https://cdn-cms.f-static.net/uploads/4403537/normal_601a468b6a0d7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://41c240d9-b4af-4f88-8fa4-2a41cce3a287.filesusr.com/ugd/01bc73_ee81d137e4ab46b39be07c5137fbd88f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/9113b0ad-47be-41fc-a322-fc4983c7890a/zokibadikofekavi.pdf
    • https://uploads.strikinglycdn.com/files/5f464ea5-4d75-4372-8971-4ff7282a0faa/canon_mx430_driver_download_windows_7.pdf
    • http://xajezenu.epizy.com/whats_the_coldest_it_gets_in_lakeland_florida.pdf
    • https://uploads.strikinglycdn.com/files/77363437-b10a-4308-8b08-fc581dcff621/1008_names_of_lord_vishnu_download_tamil.pdf
    • http://waxeduvipi.epizy.com/94533703540.pdf
    • https://5b0e1d79-1acc-45ba-a965-31015372eee8.filesusr.com/ugd/67f5f7_5e70be6072fd4361ba93f95972b60a27.pdf?index=true
    • https://d6aab468-caab-4d9e-910f-d3bf64ae4104.filesusr.com/ugd/5438e3_a70cfe1faedb443288150ca3ae63ead6.pdf?index=true
    • https://c6926203-1eb9-401e-9afa-11f61f201807.filesusr.com/ugd/685707_d8ae43a200604d1aaa41d3b280555ea3.pdf?index=true
    • https://8d94caac-80d5-4f6d-a73a-04ed47837dc1.filesusr.com/ugd/585b1d_97328bd633e94b5e8a4caad90f87f76f.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd58.bin
e3d090ab18d413a329e25cd6ee110e1f548ec35a23111b8a1cf3249bada35f7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD58 5288 bytes
font_01_sfnt_off00010f73.bin
a93fe25626bf24c1c5a253d8e979f25a04fdf2301fd40f00f109d4fc025353c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F73 11148 bytes
font_02_sfnt_off00013597.bin
3e66ce8c90719045bf8f6c8d5f716325bbce29c89c8399c9e71e7e90b46a9b16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13597 16028 bytes

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