Malicious PDF — malware analysis report

Static analysis result for SHA-256 864cfa7f0772ae53…

MALICIOUS

PDF

85.7 KB Created: 2021-04-19 02:12:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: f8317a969b3cc12e872d0c42889ba0c7 SHA-1: 2841c2b5dac0ac9f2b78802dd73f788383bfe2e3 SHA-256: 864cfa7f0772ae53868e22c2fefe24039f91153a54324d96bf13bab032a8fcd8
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The document body text is heavily obfuscated, but the presence of an external URI suggests an attempt to redirect the user to a malicious site, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://jottigo.ru/strik?utm_term=and+they+were+not+ashamed+summary PDF link annotation
    • https://cdn.sqhk.co/navimoxa/igjs7jI/47355838051.pdfIn PDF document text
    • http://zixudivibudizu.scienceontheweb.net/citric_acid_cycle_pathway.pdfIn PDF document text
    • http://manapuzasupin.sportsontheweb.net/ancova_in_spss.pdfIn PDF document text
    • https://cdn.sqhk.co/revujinarewu/hjKhfNK/batman_telltale_series_review.pdfIn PDF document text
    • http://dotavulilego.mypressonline.com/51440451144.pdfIn PDF document text
    • http://gprofights.ru/domulegabafizbk65z.pdfIn PDF document text
    • http://strgb2.ru/gebuwiduwifodadupawuxekadlzgjc.pdfIn PDF document text
    • http://sputnews.com/i_hope_youre_doing_well_lyricszww6u.pdfIn PDF document text
    • http://kersita.space/mezefugewadabogipexorii1nhq.pdfIn PDF document text
    • http://just-gopro.com/barefoot_investor_2019pgwq9.pdfIn PDF document text
    • https://cdn.sqhk.co/fivuwunar/CV7gdgd/31567917570.pdfIn PDF document text
    • http://lapegokexixij.medianewsonline.com/xasulojir.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dffcfc4-a2c3-4fce-a862-66837280abaa/abu_garcia_black_max_baitcasting_fishing_rod_and_reel_combo.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/57447695472.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c1d84bc-1190-4dd9-892a-5f362b6b0594/3931127363.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60f401bc-7fe2-4c45-bc3f-40c2954bbc7c/kidusumazukonalodezaj.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/multiple_regression_analysis_spss_example.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/pirakuputidexokunuzizobi.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/fejodokojuled.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12d74af2-3ad2-40da-b559-ba592bf60918/85029380659.pdfIn PDF document text
    • https://s3.amazonaws.com/vebogotexaf/49447839173.pdfIn PDF document text
    • http://foduxidepozipiw.myartsonline.com/63043564353.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/buferipupu.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/behind_blue_eyes_piano.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA65 5216 bytes
SHA-256: be09e93bb48561b4b033920c51666ab1333e681fd6d4449bc862e0702373d708
font_01_sfnt_off00010c0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C0F 11492 bytes
SHA-256: 729081c95df67dae127c1c26096366d42376d4dd1dd8f03bfecf86be9cfcec01
font_02_sfnt_off0001338b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1338B 16164 bytes
SHA-256: e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6

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