Malicious PDF — malware analysis report

Static analysis result for SHA-256 31e26b509ab992d7…

MALICIOUS

PDF

72.0 KB Created: 2021-02-24 12:29:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ae1ca321f5e9a0ee282e3f79b4c9cd2d SHA-1: c6ad2b86ce6ddc8a3af97b932fcf9026c4aa35fd SHA-256: 31e26b509ab992d7fab26b1fc61e00a3b4f8b0a43f2b82dff3e3ebe9fad78f86
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application T1059.007 JavaScript

The PDF document exhibits characteristics of an advance-fee scam, using language related to lotteries, prizes, and courier delivery to deceive the user. The presence of multiple external URLs suggests an attempt to redirect the user to malicious content or phishing pages. ClamAV detection and ML classification further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://leonvi.ru/123?utm_term=the+law+of+trusts+and+trustees+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4456699/normal_5fef4351108cf.pdfIn PDF document text
    • https://cdn.sqhk.co/gusiloxi/gHMnhjy/lisaziwumujedilis.pdfIn PDF document text
    • http://avtoshtorki.shop/lajisilingxi89.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370062/normal_6001399c350a5.pdfIn PDF document text
    • http://okrasote.info/lezodumefojexotapefumibophu6nr.pdfIn PDF document text
    • http://ziguzuxudatigu.22web.org/terraform_iam_user_assume_role.pdfIn PDF document text
    • https://cdn.sqhk.co/firokizita/jdhbQPQ/76046360620.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369769/normal_5fce6fe790b98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382003/normal_5fdc050c608c4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464070/normal_6005c85fd0582.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472774/normal_5fe5f8b71df2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451374/normal_5fe859fe40d73.pdfIn PDF document text
    • https://cdn.sqhk.co/sozaxejiv/wgilgiS/pajakemuz.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/rezugekolaba/cours_administration_systme_windows.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/the_most_dangerous_game_questions_answer_key.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d21d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD21D 5004 bytes
SHA-256: e0c24f5f32a106c37a62d4938eb55bd2374398432868ad0326cf9dd6a1b40e91
font_01_sfnt_off0000e328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE328 9916 bytes
SHA-256: 0db1a54b9d7889906d4913837d4aef2e3bb448f1c8825cb6c57faa6e015e3eb6
font_02_sfnt_off000104dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104DC 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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