Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9f54fbfff2f9efd…

MALICIOUS

PDF

80.5 KB Created: 2021-04-16 09:46:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 020d9b61386215f49b8c47527b6df32c SHA-1: e564258cffcc5b72915cd768ff9a7a1d7603485d SHA-256: f9f54fbfff2f9efda3501a96cd540bad042d3d85c2b4f94dd66aff30591e9db2
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL points to a suspicious domain, suggesting it is used to deliver a secondary payload or redirect users to a phishing site. The document body, though heavily obfuscated, contains references to a textbook download, which is a common lure for phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://xezojetit.ru/strik?utm_term=harsh+mohan+textbook+of+pathology+7th+edition+pdf+free+download PDF link annotation
    • https://jinezivatu.weebly.com/uploads/1/3/4/6/134687025/tegofide.pdfIn PDF document text
    • https://pipenuxoj.weebly.com/uploads/1/3/1/4/131406698/3364957.pdfIn PDF document text
    • https://jejenovo.weebly.com/uploads/1/3/1/4/131454593/4500871.pdfIn PDF document text
    • https://dorikorojuj.weebly.com/uploads/1/3/3/9/133987202/bidipatesako.pdfIn PDF document text
    • https://giretalude.weebly.com/uploads/1/3/4/6/134677333/jekiwetufipej-jikubagilin-visavenafimogug-rubosojes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jeromisixinolib/kudopezafazunewudut.pdfIn PDF document text
    • http://folijurojavagig.epizy.com/mulitulaselomiso.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/nothing_holding_me_back_song.pdfIn PDF document text
    • http://joratunezawaxa.epizy.com/imovie_title_templates_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d08f228-e0aa-406b-87fb-d52171ffa311/blackjack_book_from_the_hangover.pdfIn PDF document text
    • http://kedukalof.epizy.com/cryopreservation_of_cell_lines.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/35560904303.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a34762d4-0051-453a-aa17-e0a3839ba358/satenewukowefi.pdfIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/gauge_in_mm_sheet_metal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac24fc06-f665-4036-9ac1-8214d0676c1d/how_to_create_a_website_with_wordpress_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4644d009-9061-4405-8cb7-8131be5d6662/88988203324.pdfIn PDF document text
    • https://s3.amazonaws.com/suxuzubojut/wumotipuvevaxoziw.pdfIn PDF document text
    • http://dusilasazeli.rf.gd/bmw_x3_2020_manual.pdfIn PDF document text
    • http://vowatul.rf.gd/viregepadamu.pdfIn PDF document text
    • https://s3.amazonaws.com/gopifu/82456145078.pdfIn PDF document text
    • http://bavunetaxigapi.rf.gd/equilibrio_definicion.pdfIn PDF document text
    • http://moxododokojuke.epizy.com/77416411373.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/lenovo_thinkpad_t420_upgrade_ram.pdfIn PDF document text
    • http://togaretib.epizy.com/mojunezoxusokede.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_off0000f905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF905 5964 bytes
SHA-256: 7a72c24ae011cf29f11dd425a3f6a98c50211800b4f83d9659498fbebd4c9faf
font_01_sfnt_off00010d42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D42 11500 bytes
SHA-256: 4f3aa631fa82867685a4a22266a02d9d1cf1ef5faaf925b6a92bdbb25f725a86

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