Malicious PDF — malware analysis report

Static analysis result for SHA-256 aadc7d61fc447a79…

MALICIOUS

PDF

79.3 KB Created: 2021-01-27 19:40:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 72599184eb1dd034a073f172647c04fb SHA-1: 136501c1b493f41a216c09e231b1a5ca27f4adbb SHA-256: aadc7d61fc447a7966d9095e5675f000712c56cbd37b4d892e64b33992af61c9
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that mimics a search result, likely to trick users into clicking it. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URI are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wb?keyword=barbie%20cooking%20cake%20games%20to%20play%20now PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4423429/normal_6006e9eb30d23.pdfIn PDF document text
    • http://vekvelo.ru/dunkirk_battle_history22fxg.pdfIn PDF document text
    • https://cdn.sqhk.co/fesakesovoka/jcM6hi5/45848219507.pdfIn PDF document text
    • https://cdn.sqhk.co/notizejamebo/iOhjhat/dish_anywhere_app_for_windows_10.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462678/normal_5fc6f39049eff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393022/normal_5ff3ea8d00b2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407729/normal_600bdf0e71561.pdfIn PDF document text
    • https://cdn.sqhk.co/sisalubitot/gehfgdS/veruzozapugitiw.pdfIn PDF document text
    • https://cdn.sqhk.co/silutoge/aijiecl/bijokatubutoronu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461202/normal_600a29c60e6fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408346/normal_600bb15c653af.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419851/normal_5fcc920a60486.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376866/normal_5fe00f3d49311.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420235/normal_5fc777c9665d1.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://s3.amazonaws.com/jiwisi/lologufudowivuvonixe.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/hp_ink_tank_415_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/rijizorovit.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/2472977935.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_off0000e9f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F6 5488 bytes
SHA-256: c73dd491facb841f442e7b1bc4c6c3b051e2c860a74a3d3e30bac6b0cbf68acb
font_01_sfnt_off0000fc99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC99 10816 bytes
SHA-256: 4a773a3a8135ef257785ac4f6768672f2631d297f3a87150eb0497242c1250ac
font_02_sfnt_off000121ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121AE 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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