Malicious PDF — malware analysis report

Static analysis result for SHA-256 c79062ec40f962f1…

MALICIOUS

PDF

107.8 KB Created: 2021-03-31 11:38:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d51f48293246b8ac22cbefb07441e0d SHA-1: 4463b1787d91aa3c6ae0361ac836b09b8fa50e11 SHA-256: c79062ec40f962f1b732a294a92a803dd10f6fca621fc3556a5f2c5fee5ae936
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, and contains an embedded URI pointing to a suspicious domain. The presence of an external URI suggests an attempt to redirect the user to a malicious site, likely for phishing or to download further payloads. No scripts were extracted, but the PDF structure and embedded URL are strong indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://resalured.ru/wix?keyword=%25ED%2595%259C%25EB%2581%25BC%25EC%25A4%258D%25EC%2587%25BC+%25EB%258B%25A4%25EC%258B%259C%25EB%25B3%25B4%25EA%25B8%25B0+%25EB%25AC%25B4%25EB%25A3%258C
    • https://static.s123-cdn-static.com/uploads/4467577/normal_5fdeebb69e1b0.pdf
    • https://sudogela.weebly.com/uploads/1/3/4/8/134846286/lamewijeba.pdf
    • https://penogefuf.weebly.com/uploads/1/3/2/7/132740618/33691d525d86.pdf
    • http://fumigatoff.online/practical_machine_learning_projects81a0a.pdf
    • https://telemoradez.weebly.com/uploads/1/3/1/0/131069753/e3a2c3.pdf
    • https://static.s123-cdn-static.com/uploads/4412160/normal_6007240e1c018.pdf
    • http://tryici.xyz/58748745814i1jve.pdf
    • http://jorowijedo.mywebcommunity.org/38409648757.pdf
    • http://dabopoxele.getenjoyment.net/ncert_maths_class_11_solutions_free_download.pdf
    • https://static.s123-cdn-static.com/uploads/4366045/normal_5ffe0fb03cda0.pdf
    • https://xapotitiguwux.weebly.com/uploads/1/3/4/6/134668809/7995291.pdf
    • https://nutovavodus.weebly.com/uploads/1/3/4/0/134012609/9893467.pdf
    • https://static.s123-cdn-static.com/uploads/4408993/normal_5fefc7fbb6102.pdf
    • https://cdn-cms.f-static.net/uploads/4443619/normal_602025b263618.pdf
    • https://static.s123-cdn-static.com/uploads/4480412/normal_5fdda5090072c.pdf
    • https://cdn-cms.f-static.net/uploads/4368781/normal_6056f6017a2ae.pdf
    • http://techanomic.com/26433552798zn7ob.pdf
    • https://cdn-cms.f-static.net/uploads/4446492/normal_60269cb9b9b0b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/41ec7684-519c-463e-bc5f-707799144163/miniature_dachshund_puppies_columbus_ohio.pdf
    • https://uploads.strikinglycdn.com/files/d9accc01-6c78-4e14-b69a-9af33c0a30bb/how_big_is_a_american_football_field_in_meters.pdf
    • https://uploads.strikinglycdn.com/files/1c9e3fd0-cfc3-405a-aace-c065ae409dd8/fun_phonics_activities_for_toddlers.pdf
    • https://uploads.strikinglycdn.com/files/75594ba1-63e5-44d0-92e1-ebf1b5ce70b8/54457402501.pdf
    • 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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5ce.bin
1c6c28d0922594ef9c26746277210715304b2b2885dd9b0e846d32f1ee4d535a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5CE 38072 bytes
font_01_sfnt_off00015e89.bin
4f4fd1b64bc8ac3745c60995458637c7045c1d110227a1b5bcc1d134df8493fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15E89 4016 bytes
font_02_sfnt_off00016cbe.bin
eeb5e31d71f00cead1fc940f0cd48c64d31cc2a9b3bda03c141aa0d4294f0e86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16CBE 4068 bytes
font_03_sfnt_off00017a9c.bin
6d73798e1316573de797f987867f7eb30b8a1010e320f9b815ec8fc54e03b54b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17A9C 10348 bytes

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