Malicious PDF — malware analysis report

Static analysis result for SHA-256 b604f742690190d4…

MALICIOUS

PDF

148.1 KB Created: 2021-05-10 02:42:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 3d0af42b3ad0194d124f09dc72f0c3c1 SHA-1: e9f6b3e37b85905045e863b8e18557c9588519f3 SHA-256: b604f742690190d4d094e3393add9ab5018bb0b6d12ebfce63559012919e18e4
96 Risk Score

Malware Insights

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

The PDF file contains a lure related to unit conversions, which is a common tactic for phishing. It embeds a URL that points to a suspicious domain, likely serving a malicious payload. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/strik?utm_term=tabla+de+conversion+de+unidades+pulgadas+a+milimetros PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4483081/normal_5fe1577161fa0.pdfIn PDF document text
    • https://cdn.sqhk.co/malevevipali/oA7ic3e/history_of_southeast_asia_book.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453100/normal_5ff7cc9f9bbfa.pdfIn PDF document text
    • https://cdn.sqhk.co/togareguko/jg7K1oj/lejepudipagilif.pdfIn PDF document text
    • https://cdn.sqhk.co/taxeseta/jg8jjvs/456849951.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421612/normal_5feda476f0475.pdfIn PDF document text
    • https://cdn.sqhk.co/raxoxawupej/hi8iejg/reperixudipeledi.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/f4e5154f-fdb1-4f57-afe6-33124ce90355/vufogegubopawugegob.pdfIn PDF document text
    • https://952d9f4b-853a-4e85-af28-23c4d489d487.filesusr.com/ugd/8db125_0569ab2a18734f0f85eb6f23bb4d7d35.pdf?index=trueIn PDF document text
    • https://db38eef3-7d65-43a4-badd-ba39ed7d9417.filesusr.com/ugd/bd2483_d9f076c4c30b46b48562f80f198e27c3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/how_do_i_find_my_remote_access_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a3c54f2-7942-4ba5-a2de-ad865e0b0c40/is_panda_express_cooked_in_peanut_oil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/507a4ddd-b745-41e8-a989-6a627e76b42f/69264296333.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9c87ca5-330b-4871-b72e-3a930a97cbf8/lejiboruzolomiti.pdfIn PDF document text
    • https://9d1e48ad-bcd7-4831-9b7b-7108443a63b6.filesusr.com/ugd/136d07_0e66dff94f6e4030bc5bd76982362670.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2071d26c-271e-485b-91a3-a118079ad778/cannon_wide_body_80_gun_safe_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecbbbf2b-ebf2-4ad8-84f5-500c6b88b8e3/surijujifegenaxujoposeduk.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/12160396394.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61050b04-3a56-4bf5-b2c5-909a610d0e61/how_is_oxygen_important_during_germination.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd34846e-3b28-4726-8b80-8395f91396b8/34499114598.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_off00020430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20430 5540 bytes
SHA-256: e441bf28a1ccc2c246914cab9d28163f9c5f5ee090e77798fed3dc626c77a523
font_01_sfnt_off000216f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x216F8 13004 bytes
SHA-256: feb3096c68f94e8c25c1bb853beebb8e630c98431ae0839a534034dbdbba89b7

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