Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bd174c197b4835f…

MALICIOUS

PDF

83.3 KB Created: 2021-03-17 14:01:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: ab71a65396e6c85aba475b70ab851b30 SHA-1: d9e505d990925632ececc1cb6457cbc7af3208aa SHA-256: 7bd174c197b4835fc632570c441a1affcf9c4c54cf0d8ee8355d5ce7ede195d8
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URI pointing to a suspicious domain, identified as malicious by ClamAV and an ML classifier. The document body, though heavily obfuscated, contains text fragments that suggest a lure. The presence of an external URI indicates an attempt to redirect the user to a potentially malicious site, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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/strik?utm_term=what+are+the+rules+of+etiquette PDF link annotation
    • http://birixuxewazotaz.mywebcommunity.org/jitukuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474449/normal_604fbf1e40b36.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488558/normal_60046e0109516.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483851/normal_601171046bc2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502721/normal_602f4aa4a6e1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386084/normal_5fd8405dec08d.pdfIn PDF document text
    • http://fukazab.mywebcommunity.org/eclecticism_architecture.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/defipedibe/tatemobepokevevi.pdfIn PDF document text
    • https://13ea8442-998f-4f14-ba3b-7f37e53a414c.filesusr.com/ugd/008a9f_19d84b539f704d73b9d54f5fad3636be.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/i_look_forward_to_answering_your_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/what_are_the_3_compound_words.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91ef79ce-7f95-496e-a384-474c16fa6036/74374839118.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2a296ef-3e8e-4840-9871-546995e77b5c/jogugademoxenuxafokovo.pdfIn PDF document text
    • https://c6f55193-7475-4343-97dd-33cb3b141b6a.filesusr.com/ugd/808d8c_95ad07303d384060a57dcf6dc1438cae.pdf?index=trueIn PDF document text
    • https://d6b7b3c7-8429-4d82-9d75-5d5d09e763cc.filesusr.com/ugd/a8c229_49fd13ed14034a578d9bb9c8dd3a1e48.pdf?index=trueIn PDF document text
    • http://jezevenakos.myartsonline.com/4150960861.pdfIn PDF document text
    • https://6a24fdd2-d4a5-4c4b-882b-0f3115751bcf.filesusr.com/ugd/04e6f9_375fdc8e54cc427399af0f8ae38b5fba.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d186f25-6e37-40bd-912f-058fbad1bf7d/description_of_the_rainbow_fish.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/vafemasaxojivogepapu.pdfIn PDF document text
    • https://77ac2d45-d533-4b4b-a85c-01e81860bff9.filesusr.com/ugd/7f1ad7_698823740b3d4a92a747a388c65aef5b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/formule_actualisation_taux_d_intrt.pdfIn PDF document text
    • https://s3.amazonaws.com/gonima/fazuzavin.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/conversation_english_practice.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ADA 4992 bytes
SHA-256: c1ff520fea60303ae82ededcd6917f618c1250de2dc5eda6ebbe0cb20f7a2d53
font_01_sfnt_off00011bdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BDD 10416 bytes
SHA-256: 110177a69330fd0faf9606b0cbde0d197669bf9686a51828ab7691607a3694bf

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