Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ae463932b9fc3c0…

MALICIOUS

PDF

79.6 KB Created: 2021-03-01 10:08:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 29a70b3f2cb0c67be3f63bd13245efee SHA-1: 55a940bcc6c5f2f51abeff78e04f75c1934cf0d2 SHA-256: 8ae463932b9fc3c0387dde6ed315c85db682870613ce320a9dd9349a82662dbe
154 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of a malicious redirector URL suggests an attempt to phish or deliver a payload, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://dafemum.ru/aws?utm_term=sony+bdv-e3100+home+theater+system In PDF document text
    • https://static.s123-cdn-static.com/uploads/4459926/normal_600200df8c171.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407733/normal_600274989fe4f.pdfIn PDF document text
    • http://labifovejes.mypressonline.com/79880590400.pdfIn PDF document text
    • http://wulutapebime.getenjoyment.net/bmw_x3_workshop_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469623/normal_603464a44b226.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/protein_assay_biuret_method_lab_report.pdfIn PDF document text
    • http://rubaporejolo.rf.gd/phototropism_experiment_grade_12.pdfIn PDF document text
    • http://mojofukiw.epizy.com/articulos_cientificos_de_ingenieria_quimica.pdfIn PDF document text
    • http://pitefabe.epizy.com/berlitz_english_course_level_3.pdfIn PDF document text
    • http://mujozigimak.rf.gd/29574118566.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/canvas_svg_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/suraridepudek.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/kawolupavu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC80 5568 bytes
SHA-256: 2df9f133001de9bfacd9d71f849ff10fc15b1c08d23baa7534a45a1a7dab5bea
font_01_sfnt_off0000ff50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF50 10488 bytes
SHA-256: ed15e9d093892961d4f48be45a08e93f4eeff59aaba06fe5f663a5690877c3eb
font_02_sfnt_off0001233d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1233D 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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