Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cce9f25e082e963…

MALICIOUS

PDF

67.3 KB Created: 2020-12-23 01:00:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 790835bc09e33b28d8908a6fc62f57fb SHA-1: 53a13afa45ef5a7528492c9f15ec19c516c03449 SHA-256: 4cce9f25e082e963a5a62c9fa8570b46d24cab2c181572d73a01aaf072c6cc10
104 Risk Score

Malware Insights

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

The file is identified as malicious by a ClamAV signature and an ML classifier, indicating a phishing or trojan payload. The embedded URL points to a domain associated with malicious activity, further supporting the phishing lure. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it is designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafftec.ru/aws?utm_term=trueman%2527+s+elementary+biology+free+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407084/normal_5fd272f24ce83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388271/normal_5faf9a8196720.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380674/normal_5fcaaa321fe2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463560/normal_5fbee0e549171.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc3676dc6d96458363207a7/t/5fc6dc678f0796361568e459/1606868072374/wukavifaxal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c2a39db-8049-4942-a5bc-6ca6ab43ea25/selikif.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/xigolo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5157f3dfdd95b60f01633/t/5fcf7a8ab8233e30dfad0fea/1607432843235/aamc_mcat_dates.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc14892f9866f3fd2d6f995/t/5fc679d2e6d49a06bb72fbd7/1606842835274/xukejezariviranixababi.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/cardioform_septal_occluder_mri_safety.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5451ac30a162e0c6f580a/t/5fcc0a1c978da30c56ea626f/1607207453198/gunship_strike_mod_apk_unlimited_scraps_and_money.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dec580b1-4562-4442-a810-e3d06fe3f04e/64272532497.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc64f519955c744b5603647/t/5fca3cb44e3f3d251746c14c/1607089333110/lokedobob.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_off0000c81d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC81D 5588 bytes
SHA-256: b34aef142a4f6c2f6f1ebcf6fbb31b7701639a63076521327ab0fd50e488011f
font_01_sfnt_off0000db0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB0B 11060 bytes
SHA-256: dde56abc55c7eae9a0a92f6b4eee84f90ae19300d3feaab9a997a7fc8fdd1a5a

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