Malicious PDF — malware analysis report

Static analysis result for SHA-256 d32912131fed8c4c…

MALICIOUS

PDF

84.9 KB Created: 2021-02-15 14:50:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: f996512939ecc3a34d8f805265192cde SHA-1: fb00279c435c00fa6aaadd13141a007b0b29e1c5 SHA-256: d32912131fed8c4ca859fb752339e08f84b00ad9f2b6ea5362b009b1a5c71374
104 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that leads to a site offering a download, further supported by a heuristic indicating a visual download button lure. The primary IOC is the external URI pointing to a potentially malicious download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=how+to+make+a+steam+whistle+pvc PDF link annotation
    • https://cdn.sqhk.co/gawagunikuw/lghkVhi/mobizen_mirror_pro_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485569/normal_5ffef98751099.pdfIn PDF document text
    • https://cdn.sqhk.co/tebefaravuz/FYngdif/zeluxepupolekafezodog.pdfIn PDF document text
    • https://cdn.sqhk.co/dewavasese/3RicfTJ/43024472774.pdfIn PDF document text
    • https://cdn.sqhk.co/mobubivifa/0jdhfjw/tip_top_nails_orlando_florida.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/jusuberu/mosfet_irf9540_datasheet.pdfIn PDF document text
    • http://benobex.epizy.com/colour_atlas_of_veterinary_pathology.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/wexiriv.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/94461366570.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/cartoon_hd_free_for_pc.pdfIn PDF document text
    • http://zoxizagujaniru.epizy.com/47098917865.pdfIn PDF document text
    • http://bopuxenuxesozu.rf.gd/nulixokojof.pdfIn PDF document text
    • http://pamubaj.epizy.com/67730620414.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/haverhill_police_department_accident_report.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED5B 4936 bytes
SHA-256: dc7a17d08ef73aabb8e13d615b884dbf27443001f807e7ff3c2017442c5976fd
font_01_sfnt_off0000fe38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE38 10780 bytes
SHA-256: f9f5ca2374f7c5fabd3d57cbb70520f68807fe10e7d9de77c0faa9a717c939a0
font_02_sfnt_off00012351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12351 16108 bytes
SHA-256: b10dcad0861d5f3cd9b94bcc0b3008a2f778be511d30989fa3518a4d31d20aaa
font_03_sfnt_off000137fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137FD 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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