Malicious PDF — malware analysis report

Static analysis result for SHA-256 90b6246293347654…

MALICIOUS

PDF

89.9 KB Created: 2020-12-19 16:00:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 4d2f4168890c401013227bafe784b965 SHA-1: 17a181d000f1a768f7402a3d2b4e1157c55172f8 SHA-256: 90b624629334765488aeaeb4e516328e683b8d3d63cfcc356ddb5d90b1d79e99
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is a PDF document that contains a suspicious URL and was flagged by ClamAV as a phishing trojan. Heuristics indicate the presence of an external URI and a visual download button, suggesting a lure to download malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffset.ru/aws?utm_term=barfi+movie+free++hd+1080p+filmywap PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4455370/normal_5fc8a4599b693.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b374f88-7ea3-48de-a839-37f8711e43f7/pagibo.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/43902299337.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/loxusafulisedazimenomaba.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0b633d26ff1194f72bba3/t/5fc4a449bc819f1cf46bf699/1606722634165/gijemilipipop.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/neronisojemesinag.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc27eb48ef7301f8b1ae02f/t/5fc6020c3485235c8695308b/1606812177797/how_did_nagato_uzumaki_get_the_rinnegan.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc14b3cc89e1c4b8fc11549/t/5fcf6cd564290b1c3dd79e16/1607429333578/tor_browser_linux_github.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/bronchial_asthma_bts_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/fifuto/rachael_wallace_lcsw.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc570c5104edf1d779fad1f/t/5fce0faf2bc7884852dbe5bf/1607339952899/jinaxiwoj.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1d3b3f9866f3fd2dadad4/t/5fc5e94ecb3e0f57711c1681/1606805838379/ap_human_geography_exam_2019_practice.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_off00011d9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D9E 5796 bytes
SHA-256: 04f6ccb5347dc2623c9c5e956a6897c06a5bf225767a8b0095d6cd4f98050a09
font_01_sfnt_off00013152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13152 12224 bytes
SHA-256: 4cf4df74643fec91184472d505af2b2c918331a668875afa774ed255cd4d469f

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