Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb91831e78639ce7…

MALICIOUS

PDF

101.0 KB Created: 2021-05-24 09:57:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: d8a2a0f5ab1122fdfe76de23a4191bf2 SHA-1: 0888beed5a43ccb75fe39be00c0911574adf9851 SHA-256: bb91831e78639ce78b6968069215e8c1afce774e353495b0b0f8e91daddfcc33
96 Risk Score

Malware Insights

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

The PDF document contains an embedded URL that redirects to a malicious domain, likely to deliver a payload or phish for credentials. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest it's designed to exploit vulnerabilities or trick the user into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://fokemale.ru/wb?keyword=how%20to%20build%20a%20mob%20farm%201.16.5 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4424646/normal_60669dd250f29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385410/normal_605b097c61cf3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419836/normal_6038df704b6ad.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/topipovikapari/apollo_munich_health_check_up_reimbursement_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b88498b4-4777-4899-ac6d-d7e97c15168d/27611277546.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13960131-1573-4b65-b52b-bfff6e63a82a/how_to_make_ikea_kallax.pdfIn PDF document text
    • https://s3.amazonaws.com/gazijewevan/84974934967.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/69363305750.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/66964683830.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/sevigigobu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6552d2d-30b2-4d82-ad49-fb64def5dd07/john_grisham_latest_paperback.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac0eb5f8-26ee-4ec2-a827-12d53ca0bb37/the_descent_of_man_grayson_perry_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/tumukabibinubo.pdfIn PDF document text
    • https://s3.amazonaws.com/wonumafubij/number_format_php_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/tobisitas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2eea5444-5b8f-4bb8-8251-2249fccf79ed/what_is_my_ivr_pin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c02a1160-dbde-4eb8-a08b-76870aeb219b/settings_for_fender_champion_20.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/graphic_designer_jobs_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/gaziweronulerufemak.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/57602315007.pdfIn PDF document text
    • https://s3.amazonaws.com/gedexim/rodakel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/023c2a82-3797-462a-bcd2-5e6a0434b70c/world_war_zero_seven_years_war.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/action_verbs_worksheets_grade_4.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_off00013dbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DBB 5088 bytes
SHA-256: 68b42bccb636db653da367651ed2d6475b67f14fe0324d5fdf186e5b2b63fdec
font_01_sfnt_off00014f22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F22 11548 bytes
SHA-256: bb82a609669291697ddc241652f3cdfcecbab3c9d5cce60df744a5b3738fdc30
font_02_sfnt_off0001768d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1768D 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

Open this report in the interactive analyzer, or submit your own file for analysis.