Malicious PDF — malware analysis report

Static analysis result for SHA-256 722dbcb4e47fb0ed…

MALICIOUS

PDF

225.9 KB Created: 2021-03-02 11:44:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 2789b74cd4097b4a87e8af3ccb764043 SHA-1: 59ed30de2b67e7e756ccbbebc81428e61cc63041 SHA-256: 722dbcb4e47fb0ed94a72d143e7a0fc141c4010ae91c43786607f2049024d223
136 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure that instructs the user to copy and paste content into a command-line context, which is a common technique for executing malicious commands. The presence of external URIs and a high ML classifier score further indicate malicious intent. The ClamAV detection confirms this assessment, identifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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=what+period+marks+the+european+renaissance PDF link annotation
    • https://vorujefam.weebly.com/uploads/1/3/4/3/134322124/2905397.pdfIn PDF document text
    • https://bolumuratojepo.weebly.com/uploads/1/3/4/7/134749128/2233806.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468270/normal_6032a15bebf84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387218/normal_601dcee95d0e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480904/normal_600f320beefaa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454432/normal_5fc7e818d7f20.pdfIn PDF document text
    • http://xuponigivixi.66ghz.com/bang_bang_video_song_salman_khan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421205/normal_60175443df41c.pdfIn PDF document text
    • https://cdn.sqhk.co/zopizote/3jaSGjg/12643682802.pdfIn PDF document text
    • https://cdn.sqhk.co/sejixikerut/awijZie/youtube_2020_subaru_forester_sport.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/boduxatavepe/chronic_anemia.pdfIn PDF document text
    • https://s3.amazonaws.com/paxunu/wilamikoxawinilimife.pdfIn PDF document text
    • http://tilitun.epizy.com/dyson_v6_operating_manual.pdfIn PDF document text
    • http://zowonoz.rf.gd/55179337475.pdfIn PDF document text
    • http://leperipuf.rf.gd/34082464682.pdfIn PDF document text
    • http://vipezirovopegem.epizy.com/where_can_i_start_reading_spider-man.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/what_happens_if_we_die_alone.pdfIn PDF document text
    • http://xaviwawav.epizy.com/ignou_date_sheet_mca_2018.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off000331e2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x331E2 31860 bytes
SHA-256: 912f984549325d7bda704200ff08d8061b0fe9a18a2c8d934cf587efdf9164c4
font_00_sfnt_off0002ece8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ECE8 5240 bytes
SHA-256: cb01c8ee2511d996ac57e31100f7ce63d89fce2884d37775654f338556e4fe72
font_01_sfnt_off0002fe9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FE9A 17720 bytes
SHA-256: 4e7a9e208e0d09313b10b0739ea8f2b46a3d76ac3d710de4880b27e99d8aa5ab
font_03_sfnt_off00036a72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36A72 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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