Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3b0ff0ae757c5bc…

MALICIOUS

PDF

149.4 KB Created: 2021-05-26 13:53:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 86fe769b801ff9e19ab1dbaee07c76f8 SHA-1: 448ca507743947b8ba70fd7b24cc3dbae6cd149b SHA-256: a3b0ff0ae757c5bc06c41bb96da2c9fc6665b7b690f43fbac3d6094b24e518bb
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URL that appears to be a lure for downloading a keygen, which is a common tactic for distributing malware. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to trick users into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://ponafet.ru/strik?utm_term=indesign+cs2+keygen+free+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4383128/normal_5fcf865b7e75c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488332/normal_6040eaaad1983.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460476/normal_60037f9d8a417.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470961/normal_600ee7179789d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486763/normal_6051005bc5abb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498994/normal_6059fcfe0e45d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495707/normal_605c882a0d878.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383327/normal_6026656c13dab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484995/normal_604f2b703b005.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444115/normal_606a26ade6c7b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488330/normal_5fc87b70420b3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453560/normal_5ff209eb63f22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366358/normal_60159dfec242b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403674/normal_6065846e8bad0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447906/normal_5fcf3478b1964.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467298/normal_6030f66cbf333.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/bb1e454a-d9a0-4a72-ae31-6d0514652ad7/dinodukoluxotupigimubovip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc518d56-97ca-4dd9-98ac-7b5177535022/how_to_crochet_a_baby_boy_hat_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c75c932c-313b-4370-ba62-7eaf4e8d8180/babawotogaporopazilupiwet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6444890e-4f83-40c0-a914-0c8b0069aa4a/situacion_social_del_renacimiento_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ded0e93-9d91-4b83-b865-c52aa9b21633/maxosusanovag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbe463d6-0fff-4aa9-b539-9a7142359fd5/how_to_turn_on_lights_in_keyboard.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd4072ca-ad3c-4781-9f52-4674c18d1a2d/72405467570.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e1bb275-ef37-4691-bfa8-299175dfb375/tecumseh_carburetor_instructions.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000e5c6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xE5C6 94360 bytes
SHA-256: d65edb96c59c36a9aebc828d5fb89bc12b75f183f374ded09af7935039a7c5e7
font_01_sfnt_off0001f95c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F95C 5516 bytes
SHA-256: 8080173ace925e30fc5222b52fd17d1c10d4dd95a96fc2794d5d28e18acc7489
font_02_sfnt_off00020c52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20C52 10796 bytes
SHA-256: 975e6b0bd4cb4e21cc2b8ef9b0178a0fefbcb3547627226480a7bc52aeaf39ef
font_03_sfnt_off0002316e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2316E 16404 bytes
SHA-256: fca5a0a8355d3a8d14f2eb9a79909808e9965e57ba5b00c5e4cc550b7f148fff