Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1df884709c23856…

MALICIOUS

PDF

75.1 KB Created: 2021-01-23 17:21:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 593b457fc1d8d82a566d70a580e1e19c SHA-1: e59893ce9ebceca65493fcaee905dfc4fb733ecb SHA-256: a1df884709c23856417c933689cf6a2f1096c2dab6615512ec3a3daed7be21b2
104 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is a PDF that has been flagged by multiple heuristics and a machine learning classifier as malicious. It contains external URLs, one of which is presented as a download link, suggesting a phishing or social engineering attempt to trick the user into downloading a secondary payload. ClamAV detection further confirms its malicious nature.

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/aws?utm_term=monthly+financial+spreadsheet+template PDF link annotation
    • http://potusowo.22web.org/57733289965.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465685/normal_5fee987fbc245.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447914/normal_6004a0f2931ca.pdfIn PDF document text
    • https://site-1177775.mozfiles.com/files/1177775/business_continuity_management_guidelines.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444098/normal_6008641b1e792.pdfIn PDF document text
    • https://site-1177443.mozfiles.com/files/1177443/kanaberum.pdfIn PDF document text
    • https://site-1167927.mozfiles.com/files/1167927/finebigimofikifi.pdfIn PDF document text
    • https://cdn.sqhk.co/tefulobesa/Umidhif/8_ball_pool_online_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468289/normal_5fd1f970b8863.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443814/normal_5fd117e2722e4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477379/normal_5fdfa90a8c61c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450439/normal_5fea1aa9ca5f0.pdfIn PDF document text
    • https://cdn.sqhk.co/goberirud/a1jf5ie/furniture_stores_hubbard_oh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427781/normal_5fc9550d84321.pdfIn PDF document text
    • https://site-1176387.mozfiles.com/files/1176387/182420330.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e7d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D2 5500 bytes
SHA-256: fc06f977aa89cb0b38681a6fd53d2d2b23ce6d237f196921ef826efa55557837
font_01_sfnt_off0000fa75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA75 10704 bytes
SHA-256: 5e71076adfa1fbf01439c8b269e68762d8ac93c551d63a3376a6c8ba4e7a9dcf

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