Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b884a8173c22db5…

MALICIOUS

PDF

84.4 KB Created: 2021-02-11 13:26:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 4e38b8ecf0f6322fd67b31f5b6817cc5 SHA-1: 5a847a734592591cc278ac3f2974bf3bdca4ae9d SHA-256: 5b884a8173c22db5959790b68b732d9daeed3abf2609d143ab13e38b3cdee39e
96 Risk Score

Malware Insights

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

The file is a PDF containing multiple embedded URLs, one of which is directly referenced by a heuristic firing. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

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://jacksth.ru/123?utm_term=defy+florence+sc+phone+number PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369494/normal_5fdc1a7753d5b.pdfIn PDF document text
    • https://cdn.sqhk.co/limizolaxa/rDaghhi/surface_area_of_a_rectangle_calculation.pdfIn PDF document text
    • http://filemarker.store/9595211433532cif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469106/normal_6015f255dcc6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445321/normal_5fd965a4d4f3b.pdfIn PDF document text
    • http://soldatskaya6.ru/63402126881wmdew.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377401/normal_5fe0696f107cb.pdfIn PDF document text
    • https://cdn.sqhk.co/vimerokil/ahcJ2gg/lipoxarifagibovirogunil.pdfIn PDF document text
    • https://cdn.sqhk.co/ledazukogim/ZCSiiZA/45576169751.pdfIn PDF document text
    • https://cdn.sqhk.co/linotepibubi/hajjHjd/milomuderuviti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390663/normal_6011f20634f3a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427095/normal_6008fc0d86503.pdfIn PDF document text
    • https://cdn.sqhk.co/gufezitaxato/pMlhgmF/ducks_basketball_roster.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426422/normal_5ff9f8f1de067.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459774/normal_5fcb07fc0f9c3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448718/normal_5ffeeeb86dbc5.pdfIn PDF document text
    • https://cdn.sqhk.co/terasovo/hKFz2B2/29173644312.pdfIn PDF document text
    • http://glawerry.online/canon_in_d_easy_piano_free0wknh.pdfIn PDF document text
    • https://cdn.sqhk.co/lerapuraroke/hhhjjhi/winepulibuviguvirepinewa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://regigaxuwejizu.epizy.com/fogezezusukipela.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF655 5288 bytes
SHA-256: e347206d029369798fcf206d4fa6d1aeb504fe584bb3ab857327fe6e72d13aa5
font_01_sfnt_off0001083b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1083B 10856 bytes
SHA-256: c4aaf30e9f47e7c34b894fb2d20c2ec9a39db6e5d49abd8914c99e1779f16340
font_02_sfnt_off00012d7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D7B 16492 bytes
SHA-256: 9de76cc2837807e8904c186262326276ccebf0a134fc4f69ff0e0e76987e9a5c

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