Malicious PDF — malware analysis report

Static analysis result for SHA-256 8af2fc1ad77064c8…

MALICIOUS

PDF

79.1 KB Created: 2021-01-30 10:01:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a7cb8eacbd875a0e1cd36e637ed39e73 SHA-1: e0092147f4ee5de58024818ccc3af893c489697f SHA-256: 8af2fc1ad77064c8f93e332e1ce32511f56ef6ea03cbdc2f67f0323c886b8d61
104 Risk Score

Malware Insights

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

The file is identified as malicious by a machine learning classifier and ClamAV, with a heuristic indicating an external URI. The presence of a 'download button' lure and an embedded URL suggests a phishing or social engineering attempt to trick the user into downloading a payload. While no scripts were explicitly extracted, the PDF format can embed JavaScript, which could be used to facilitate the download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffnew.ru/wb?keyword=fire%20wallpaper%20hd%20download PDF link annotation
    • https://cdn.sqhk.co/pesuxitum/2mGXn9o/talion_meaning_greek.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370072/normal_600265484f1e8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376600/normal_6008fca35f6b0.pdfIn PDF document text
    • https://cdn.sqhk.co/gujadozede/gfIKd39/tikumiwodadegu.pdfIn PDF document text
    • https://cdn.sqhk.co/nadokikado/4hcNhdh/mine_survival_descargar_para_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501486/normal_5fe9567c8b392.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/gosete/pedodajeje.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/formato_checklist_vehiculos_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/katomipupezefetebeloruda.pdfIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/dozumoxapugokeni.pdfIn PDF document text
    • http://savikolapuxol.rf.gd/autohotkey_tutorial_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/58341086263.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/gas_chromatography_exam_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/bogijexu/product_endorsement_agreement_template.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/nunirekolimatabetodo.pdfIn PDF document text
    • https://s3.amazonaws.com/mixanaz/xikufidefazopuderilikuve.pdfIn PDF document text
    • http://kagowuv.epizy.com/dediladimeloxasixuvukegon.pdfIn PDF document text
    • http://mutifesojare.epizy.com/45954075455.pdfIn PDF document text
    • https://s3.amazonaws.com/wutogugej/kiseloxoxepomowanefakame.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/10546689666.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_off0000f9b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B8 4916 bytes
SHA-256: eee40475d5be966bdbc88bd5b2389d8533e093dcb0c395bc7c07caa6f8e4b9fa
font_01_sfnt_off00010a7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A7A 10824 bytes
SHA-256: 1db0fc24cd418f8532bf34459e4267036ef400fa35318fc1afdb0a4233cffd55

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