Malicious PDF — malware analysis report

Static analysis result for SHA-256 90f398d210c38319…

MALICIOUS

PDF

81.2 KB Created: 2021-02-23 15:54:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 03c4ad46ff752ec4908ea9e59c30cdb2 SHA-1: 730c8af56f5246e1731b9c11e78682783280e0dc SHA-256: 90f398d210c38319a58364bbe72a6118e70bf61deb9fe290a0184632b683ea39
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL `https://maypoin.ru/strik?utm_term=how+much+does+a+cashier+at+lowe%2527s+make` suggests a phishing attempt, likely to harvest credentials or lead to further malware. No scripts were extracted, but the PDF structure itself contains the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/strik?utm_term=how+much+does+a+cashier+at+lowe%2527s+make PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4419644/normal_5fde49ce8d7e7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477877/normal_5fe1c3ccb61d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449602/normal_5fdda5136c354.pdfIn PDF document text
    • http://nonly.xyz/real_estate_market_snapshot_template5jv83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413848/normal_601e87a367e09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414335/normal_60140ba3a50ba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444386/normal_5fcce3396e880.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375889/normal_60231a4d32ec6.pdfIn PDF document text
    • http://xavanafaworinev.iblogger.org/castaway_cove_mod_apk_1._25._0.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/kofabube/xafonerapajize.pdfIn PDF document text
    • http://wadedizori.epizy.com/landscape_images_hd.pdfIn PDF document text
    • http://kojomazudogog.epizy.com/real_anaconda_snake_videos.pdfIn PDF document text
    • http://tisiwiruligeg.epizy.com/87051160402.pdfIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/australian_embassy_tourist_visa_form_1419.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/dslr_blur_background_camera_app.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/ruliwaporup.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA57 5328 bytes
SHA-256: 33aed5d9e5f4ab5c9a51b7d93a5a2ddc4829b3fe132e9d511e8888ef0006b478
font_01_sfnt_off0000fc60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC60 10728 bytes
SHA-256: 089ab30f35690e2021dfb609f42fde82cf7d78f6bbbb8fa9300937d849a7b90a
font_02_sfnt_off00012166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12166 16232 bytes
SHA-256: 68eef4b610644b6a98f668349b58b424e8310755c20c018328a8321db0e17a89

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