Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2c22327e7aeb33b…

MALICIOUS

PDF

62.8 KB Created: 2021-02-12 01:28:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 7a6a3724c1c344e87869b126e2b1fad2 SHA-1: 6c2cd8edde2ee3499fbba40d2d72ba1324761be0 SHA-256: d2c22327e7aeb33be8cd17fcc77da2780b82ef559ba40eb1eef0740ea5b6f64c
104 Risk Score

Malware Insights

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

The PDF contains embedded URLs and a heuristic firing for a visual download button, suggesting a phishing or social engineering lure. ClamAV detection as 'Pdf.Phishing.Trojan' further supports malicious intent. While no scripts were explicitly extracted, the presence of external URIs and the ML classifier output indicate a high likelihood of the document attempting to download a secondary payload.

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
  • 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://druttle.ru/wb?keyword=indian%20ambulance%20siren%20sound%20free PDF link annotation
    • https://cdn.sqhk.co/jisaside/gdphhjf/toilet_making_water_running_noise.pdfIn PDF document text
    • http://rurojewof.22web.org/33433293040.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494452/normal_5fe09b88eaeaa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450440/normal_602297a0221ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445736/normal_601abe4591d19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494432/normal_60153867e7ae4.pdfIn PDF document text
    • https://cdn.sqhk.co/gupimupiset/jijggia/hku_attendance_policy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pikakodi.rf.gd/paper_plate_scarecrow_craft_template.pdfIn PDF document text
    • http://pumukozozuzife.epizy.com/leatherworking_guide_gw2_1-_500.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/british_accent_voice.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/xofeva.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/report_illegally_parked_car_brisbane.pdfIn PDF document text
    • http://zinamasab.epizy.com/going_concern_issues_in_financial_reporting.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/kebukotonu.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/chain_guide_road_bike.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_off0000b901.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB901 5244 bytes
SHA-256: fa5880d7fca697a1ff728f513fd0f5be4eb85b2720f7882f12f4496ff2ebd003
font_01_sfnt_off0000cab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAB7 9992 bytes
SHA-256: 6ca5bb654f54dce39f51625735a54ae50095da785ba3767db1dc1fd9da663e11

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