Malicious PDF — malware analysis report

Static analysis result for SHA-256 9673b0ab5297708c…

MALICIOUS

PDF

73.3 KB Created: 2021-03-23 17:22:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b436a37bcc05caa3c864f1471bd1c75b SHA-1: 27c5e8670916802334ef097d511917c3b53f60ca SHA-256: 9673b0ab5297708cb153cc7000daf73c5f976c52f2e0ed3e4c80f34615895c02
96 Risk Score

Malware Insights

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

The file is a PDF document flagged as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, 'jumiwimov.ru', which is likely used to host a malicious payload or phishing content. The document body is heavily obfuscated, but the presence of the external URI suggests an attempt to redirect the user to a harmful resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/strik?utm_term=lesco+spreader+settings+for+scotts+products PDF link annotation
    • https://cdn.sqhk.co/rogenujudita/jbZrkge/jaduwofadajikipanaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404514/normal_5fd3766ec63c9.pdfIn PDF document text
    • http://nixuvukoda.iblogger.org/chrome_os_android.pdfIn PDF document text
    • https://cdn.sqhk.co/pujazojiwixi/hiihKMa/jurassic_dino_blue_raptor_trainer_race_game.pdfIn PDF document text
    • https://cdn.sqhk.co/tatidukigag/gediazo/57053645996.pdfIn PDF document text
    • https://cdn.sqhk.co/reparepoki/hbidmBp/splendor_in_the_grass_complete_poem.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476578/normal_5fcecd9447e39.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374369/normal_5ff0e5100fc7f.pdfIn PDF document text
    • https://cdn.sqhk.co/safajoju/ghhihaa/rerurezawem.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/zulezov/arozzi_torretta_xl_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/woziriguvadofonugezox.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/xilurinisoxevefumo.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/ethiopian_reporter_english_version_vacancy.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/joxikasulipakoropozeto.pdfIn PDF document text
    • https://s3.amazonaws.com/wifukedot/ziregiwozexo.pdfIn PDF document text
    • http://vunodakurawofo.rf.gd/how_to_pay_walt_whitman_bridge_toll.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/bumonisazuruwopuvineli.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/mutixej.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/kurina.pdfIn PDF document text
    • http://xugivazule.rf.gd/46568366206.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_off0000dfea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFEA 5232 bytes
SHA-256: 5a7a1f070e76f892424cb7e93c9c8f9c3857219775bc717b31b12a8319ccf388
font_01_sfnt_off0000f1d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D0 11216 bytes
SHA-256: 98cf54e1312f06bfd2d62883b915c62af033dbfbad7620370ba7b4cc1bd82ae9

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