Malicious PDF — malware analysis report

Static analysis result for SHA-256 8662cbb4f7067a23…

MALICIOUS

PDF

83.6 KB Created: 2021-03-12 01:37:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0810c87929b6d43b20a9abadf45c288 SHA-1: 7d096bdb2744ff991c2942951285e5c6630df305 SHA-256: 8662cbb4f7067a23657334af1974d4590397a39775aa3dac11916edd0396874e
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of an external URI pointing to a URL that includes 'award' and 'piano pdf' suggests a phishing or social engineering lure. While no scripts were explicitly extracted, the PDF_URI heuristic indicates the potential for embedded malicious links, likely used to download further payloads or redirect to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/award?keyword=autumn+leaves+chords+piano+pdf
    • https://cdn-cms.f-static.net/uploads/4418171/normal_602050c33b7d5.pdf
    • http://zamuxodub.22web.org/89202323849.pdf
    • https://static.s123-cdn-static.com/uploads/4455194/normal_5fed60ea35e13.pdf
    • http://lipejunotuxo.22web.org/administration_vs_management.pdf
    • http://nout-sale.site/346910093145ubgs.pdf
    • https://static.s123-cdn-static.com/uploads/4452863/normal_5fccb54e0e8ce.pdf
    • http://podarokinsta.site/tolubedikipxwi5p.pdf
    • https://cdn-cms.f-static.net/uploads/4413011/normal_600ebd5068ddc.pdf
    • http://podjem2.club/bibliographic_information_apa_example1286v.pdf
    • http://nozumupi.medianewsonline.com/biscuits_recipes_south_africa.pdf
    • http://nuloriwilorij.scienceontheweb.net/what_does_the_sims_3_generations_include.pdf
    • http://tixokapine.mypressonline.com/viwapogipu.pdf
    • http://soldatskaya6.ru/3502820693sjiwf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://woxesizefibugel.atwebpages.com/ramadan_calendar_2020_download.pdf
    • http://zagupijalixi.myartsonline.com/tappan_range_drip_pans.pdf
    • http://rofukifunovobo.rf.gd/angular_number_formatting_locale.pdf
    • https://uploads.strikinglycdn.com/files/e1924ff1-9d23-4677-88ab-38c765af58e4/best_books_on_financial_modelling_using_excel.pdf
    • https://uploads.strikinglycdn.com/files/41c6ce2f-78dd-4f2d-9c79-f99cd39c95c0/forex_trading_strategies_reddit.pdf
    • https://uploads.strikinglycdn.com/files/64253606-1d70-4bf7-b993-134d9c783ff9/70571246061.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9a1.bin
4effc290aaaa2ceec0e9521034f25c66be28126d682167d8ac3208990fc40dcb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A1 5444 bytes
font_01_sfnt_off0000fbf7.bin
37a3a951e0f3196744583439ea37fbaa8ddcf86155db07a6721a9458a0c3791f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF7 1748 bytes
font_02_sfnt_off0001046b.bin
00f6c8d6670a062802b0d92791099584d1fb6c1fb86734a121e72b998cf3b47b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1046B 10124 bytes
font_03_sfnt_off0001271f.bin
132a32b5d55a41c3acfa1ca51ea22284a0134d56ee7fe17f1478837bfa9c25e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1271F 17300 bytes

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