Malicious PDF — malware analysis report

Static analysis result for SHA-256 f80594ce72683531…

MALICIOUS

PDF

66.2 KB Created: 2021-02-27 22:08:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: a8a41a32568476b8f7d97e2c84c7ce0c SHA-1: 91bd5d5d1b040c4cca45dfab7f5f456422f0292b SHA-256: f80594ce7268353115422f88e2ebcb360925dffcf099d5c130d80a277b5ad02c
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://jottigo.ru/strik?utm_term=how+to+beat+grow+cube+2', suggesting a phishing or malware distribution lure. Although no scripts were explicitly extracted, the presence of embedded URIs and the nature of the detection suggest it may leverage PDF vulnerabilities or social engineering to redirect users 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://jottigo.ru/strik?utm_term=how+to+beat+grow+cube+2 PDF link annotation
    • https://cdn.sqhk.co/zetarizelub/amEijDl/safe_zone_playpen.pdfIn PDF document text
    • https://cdn.sqhk.co/wunokebewoz/shjw9pv/80484793578.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485821/normal_600169a0b36e8.pdfIn PDF document text
    • https://cdn.sqhk.co/radojiga/gQ6e4oI/big_rig_truck_mattress.pdfIn PDF document text
    • https://cdn.sqhk.co/zarepowake/jeibhh1/kuropuzusiba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369507/normal_5ff460399e2bc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369493/normal_60041343a3c44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494681/normal_603960db458e7.pdfIn PDF document text
    • https://pisaloxonuk.weebly.com/uploads/1/3/4/3/134391291/zadavul.pdfIn PDF document text
    • https://cdn.sqhk.co/regavebike/bNjhcHi/magic_piano_tiles_pink.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485443/normal_5ff3e76ee98ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366343/normal_600fb29066810.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446781/normal_602c18626d5ff.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/dazinibonofobi/vegofaduxubap.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/best_small_editor.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/7001370341.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/doguraxonozukexemixaduwiv.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_off0000c90b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC90B 5080 bytes
SHA-256: d4906d7f676ccd006189a6ef8399d6c7db9f6a03f0fa5975f2baa98de2194375
font_01_sfnt_off0000da79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA79 9700 bytes
SHA-256: e8f853ca7b7c5ff14321d014e41f0b7de110071b94fed14539c5a4ee2a664812

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