Malicious PDF — malware analysis report

Static analysis result for SHA-256 90de7e2d847ef23c…

MALICIOUS

PDF

78.0 KB Created: 2021-06-02 04:21:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 09dee8f069215a3ac4ae50d0165dba7b SHA-1: d4bace0b55552fa6c160e618eb19405bf14a791d SHA-256: 90de7e2d847ef23c60805b9a9875853d7da015519b6bab323986eeca56183f40
104 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it is a phishing lure, specifically mentioning invoice or payment language. It embeds an external URI that leads to a suspicious domain, likely intended to redirect the user to a malicious site. While no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly suggest malicious intent, consistent with a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://irlanc.ru/pbw?utm_term=como+mandar+sms+de+gra%25C3%25A7a+pelo+pc PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490936/normal_600e44c465a3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373526/normal_60622161e7bc1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377381/normal_602a1921e5832.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460946/normal_5fce0043beac5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415531/normal_605a58b5adadb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420587/normal_5fc6a9d3be3c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375514/normal_601fc4a2bd5d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420767/normal_606e1af9c5ced.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448545/normal_605d9a0a6b60b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424007/normal_5ff34ef24f7bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416500/normal_6035b161e6710.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490252/normal_60494feae162f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452373/normal_5fceaa4ca5417.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401519/normal_5fe4760e24bdb.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
    • https://uploads.strikinglycdn.com/files/479c2b8a-6925-4914-893c-94f051790d47/how_do_you_write_a_payment_receipt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1f1c104-dad2-46b0-98d1-8710118d76ad/islamic_inheritance_law_calculator.pdfIn PDF document text
    • http://larabefejaji.pbworks.com/f/how_to_build_hemnes_day_bed.pdfIn PDF document text
    • http://fuxedemama.pbworks.com/w/file/fetch/144484494/zetesapupufuda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb9781ff-4d99-4a77-9e35-e36062ff62aa/solve_the_inequality_graph_the_solution_set_and_write_it_in_interval_notation_calculator.pdfIn PDF document text
    • http://liwuvedesisu.pbworks.com/f/how_to_find_diameter_of_a_circle_when_given_circumference.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_off0000e084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE084 5260 bytes
SHA-256: 55e8f217b5b49cb7bd753ae86b8f86da03d3ac27f118ceb5df4d1b0113177121
font_01_sfnt_off0000f1f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F4 12972 bytes
SHA-256: 7cf90a4ffdeccad5f96d5c37192217ec7af4704b7e404ecc8fa9b1642d45a4e8
font_02_sfnt_off00011a6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A6E 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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