Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f351077574f5a37…

MALICIOUS

PDF

82.4 KB Created: 2021-02-14 12:39:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 35cdd2b4187c1b5f9536b8ff598df0df SHA-1: 8ec76984b7d81c6f025c0710b7c52702ece4681d SHA-256: 7f351077574f5a37e41e975b231501aa1226e243db7a772c23cc9d06df323730
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or to serve a second-stage payload. No scripts were extracted, but the presence of the external URI is a primary indicator of compromise.

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://baarspo.ru/aws?utm_term=example+of+a+good+introduction+for+report PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369916/normal_5fff53fd136c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409840/normal_601cfdf851197.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425768/normal_5fed370896437.pdfIn PDF document text
    • https://cdn.sqhk.co/fekigimuzib/CjfZpjb/fashion_play_barbie_1987.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370987/normal_5fd12ba89baf2.pdfIn PDF document text
    • http://nabuvegawemuk.22web.org/85731756236.pdfIn PDF document text
    • https://cdn.sqhk.co/vidikusupegu/kn1jhid/gallery_wall_set_of_prints.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450240/normal_5ff03f77de0b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461744/normal_6010c511c1f06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386336/normal_601aee9b65e43.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505839/normal_5ff367ec5c9c3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451018/normal_5fc5df8a14c49.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456377/normal_5ff75f432a9d9.pdfIn PDF document text
    • http://nuvuzujujafusu.22web.org/61054479119.pdfIn PDF document text
    • https://cdn.sqhk.co/kerosumumato/f3gjKji/zewatubixamekujenu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://zaxutakizet.epizy.com/delur.pdfIn PDF document text
    • http://tipixerokofor.epizy.com/23638827514.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f862.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF862 5204 bytes
SHA-256: 131594da4fdfe84b1813a6b64694072320716a6c171f96f3887ae5c562df28b7
font_01_sfnt_off00010a0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A0D 10456 bytes
SHA-256: c601b1fc1b35b3a4a89f5f4b316b11301e7694f71e403dafa670adafbe30bb90
font_02_sfnt_off00012dcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DCF 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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