Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c5f3d695afe089f…

MALICIOUS

PDF

76.2 KB Created: 2021-02-27 22:53:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 677b6f20a1af4c522168c0e3e8edcc8c SHA-1: 74e5cc7153e93dde8388c2628f7ca6e6bec72e3d SHA-256: 4c5f3d695afe089f9c2d672e900b20c60770c1b5da89d9db53015d9a5cc0b68a
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, aligning with spearphishing tactics.

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://jottigo.ru/123?utm_term=should+i+invest+in+latin+america PDF link annotation
    • http://fujigukatujewu.medianewsonline.com/geotechnical_engineering_companies.pdfIn PDF document text
    • https://cdn.sqhk.co/pubisifibuj/PFhaqDp/vector_airsoft_gun_cheap.pdfIn PDF document text
    • http://dimozakebaba.scienceontheweb.net/10179651350.pdfIn PDF document text
    • http://ketaton.mywebcommunity.org/gelug.pdfIn PDF document text
    • http://lamakexo.scienceontheweb.net/43206373593.pdfIn PDF document text
    • http://juwupexutaval.mywebcommunity.org/19048448393.pdfIn PDF document text
    • http://retapadu.medianewsonline.com/is_blender_good_for_3d_printing.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/muxegeza/81034416479.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/avira_free_android_security_kostenlos.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/binary_to_ascii_converter.pdfIn PDF document text
    • https://s3.amazonaws.com/toniseligiwuzux/23965953552.pdfIn PDF document text
    • https://s3.amazonaws.com/lusegokaves/xajomileludevetubu.pdfIn PDF document text
    • https://s3.amazonaws.com/tumuzu/patience_activities_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/jigezilor/jtcvs_author_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/89399127826.pdfIn PDF document text
    • http://bubalafugevale.rf.gd/76280877955.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/82457607232.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_off0000eb79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB79 5340 bytes
SHA-256: 102ee2c305d75898216b2b4c0d5c41c914adb7bac1b650ae171b025419b8f795
font_01_sfnt_off0000fd7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7C 11500 bytes
SHA-256: 05bf4e77dcb0fe64bd208ee977dfceacb39beec63167b8237a8e547091a54bb2

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