Malicious PDF — malware analysis report

Static analysis result for SHA-256 434ef35f9d9aaab1…

MALICIOUS

PDF

87.0 KB Created: 2021-01-13 08:53:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 3062353fb8736dcbeef238fcaa74fe74 SHA-1: 76a7096675da372a59d0d90b9719763d0e5fa5fa SHA-256: 434ef35f9d9aaab18532edf3d8b1c3427956e461b004857f7d2edda9aaa853f4
104 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier with high confidence. The heuristic SE_INVOICE_LURE indicates the document uses an invoice or payment lure. An external URI was extracted, pointing to a suspicious domain, likely serving as a malicious payload or phishing site. No scripts were extracted from this sample, but the PDF structure itself likely contains malicious JavaScript to facilitate the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/123?utm_term=forest+lakes+metropolitan+district+colorado+springs PDF link annotation
    • https://site-1171615.mozfiles.com/files/1171615/to_do_list_excel_vba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380079/normal_5f99297e956fd.pdfIn PDF document text
    • https://cdn.sqhk.co/gobuwovuv/gSgj7jb/skylanders_imaginators_switch_price.pdfIn PDF document text
    • https://cdn.sqhk.co/letojeka/ggegh40/starz_power_2019.pdfIn PDF document text
    • https://site-1166064.mozfiles.com/files/1166064/gradeup_app_apk_latest_version.pdfIn PDF document text
    • https://cdn.sqhk.co/wiluxuko/LFibTfn/carson_wentz_college_degree.pdfIn PDF document text
    • https://cdn.sqhk.co/jifexekezeli/hijjhjs/diduredejix.pdfIn PDF document text
    • https://site-1211231.mozfiles.com/files/1211231/cambrian_period_sub_indo_720p.pdfIn PDF document text
    • https://site-1171615.mozfiles.com/files/1171615/dodgers_la_logo.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/XrFiijj/jozefij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404987/normal_5f99e5360c861.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
    • 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_off0000fec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC5 5412 bytes
SHA-256: b468bd07eba28caf7ecfdbbe5a5cd0100a69139921c068248affb008d75eb9fe
font_01_sfnt_off0001111d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1111D 11712 bytes
SHA-256: 257383fed7e8c734dbe2392a68088bca55c0a51b6f3277b14e2e43b873789f24
font_02_sfnt_off00013918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13918 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd

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