Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa511952b658b987…

MALICIOUS

PDF

67.2 KB Created: 2021-02-13 22:22:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 37ad25bf67a005d45857c2e4f79ef0c4 SHA-1: b4975e3cad1ef8dd77ec6019570f16cad70efdca SHA-256: aa511952b658b987a9ce86502cabaeb618da779e4b89e1c9986e464784393650
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The embedded URL and numerous other suspicious URLs suggest a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs indicate it likely exploits PDF vulnerabilities or uses embedded JavaScript to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/123?utm_term=4th+grade+planets+study+guide PDF link annotation
    • http://baugroup.info/happier_ed_sheeran_ukulele_play_alongl6o4h.pdfIn PDF document text
    • http://interior.estate/naparaluzoxerelexi5kt.pdfIn PDF document text
    • http://datinge.site/piston_pump_maintenancedqk35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464055/normal_600fc9cb4627b.pdfIn PDF document text
    • http://neuroncraft.online/59505628692ekd3l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414679/normal_601afe0c4ae53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412774/normal_6009edadb611a.pdfIn PDF document text
    • http://fitokapss.xyz/dizeturuputopexurihyaw5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366034/normal_5ffb98b79e883.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xopugup/havoc_demon_hunter_dps_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/gault_millau_restaurantguide_deutschland_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/implosion_apk_mod_money.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/28465367149.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/dawn_of_titans_hack_apk_ios.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/73815158076.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/37014433932.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/30219792198.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_off0000c8b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8B4 5316 bytes
SHA-256: 19b37416089fda8aeab3439066f97383bb13e0d86dedb6b97b31846d4568f7e0
font_01_sfnt_off0000dacc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDACC 11212 bytes
SHA-256: de9f2df1b7740c3403ecb65718c6b01f66b0f672a37a1b86b004a3977409b015

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