Malicious PDF — malware analysis report

Static analysis result for SHA-256 46648b8c4d282fdd…

MALICIOUS

PDF

67.5 KB Created: 2020-12-17 02:53:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 14cff8da5c1681d21141f601e9db0a4d SHA-1: c503715554224095e9aa043001f23f5ee92cd59c SHA-256: 46648b8c4d282fddf3285dd6e91adee219075decfe3a711661defef13506621e
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URL that leads to a suspicious domain, likely intended to host or redirect to a malicious payload. The document body, though heavily obfuscated, suggests a lure related to medical syndromes, which is a common tactic for phishing.

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://traffnew.ru/123?utm_term=nephrotic+vs+nephritic+syndrome+pathophysiology PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c55f6c5d-ea79-480c-9a38-3c29bd939d18/pezixesotebovi.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/35694189872.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0215417-f4c1-462f-bc7c-898105350799/natodigi.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/home_construction_budget_spreadsheet_xls.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc78455a4d75e5252f52636/t/5fcf160210aae77571694e06/1607407106915/lokunedazobopazofufe.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc512818ef7301f8b2bd9f2/t/5fcd8ac433187724c40a05c7/1607305926335/multi_color_changing_rope_lights.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af294e59-1180-43d8-82bf-f59da0775e04/bivixazajatusorififipaga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f650317-28f1-4849-a827-5d3fdfbbf2a9/47733418664.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2fb8aff13940aa24d3646/t/5fc86e44d17d55300fae4e2a/1606970949780/throne_kingdom_at_war_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6da9bfbf-7522-490d-a677-0b73c7306e6b/89694336724.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64c8c516-2485-4f78-8942-f0217e8e7657/72525229172.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/aankhen_dd_national_serial.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/black_s_law_dictionary_online_10th_edition.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_off0000cacb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCACB 5620 bytes
SHA-256: e6703b110c7a1261484948ee0007bd8a4405bb38ecce0e645a278b3d45cbf49c
font_01_sfnt_off0000ddcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDCB 10392 bytes
SHA-256: bb005dd3d280c00d04ac8350d8b71aeb949635fe5b0f2623040a72044d61b7af

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