Malicious PDF — malware analysis report

Static analysis result for SHA-256 46663100f45962c8…

MALICIOUS

PDF

68.3 KB Created: 2021-03-22 20:01:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 8480540a5251c1e1085e21b48e13bd8c SHA-1: 23cc573c9d73f7c2f197f3803f9b939de46bbfa0 SHA-256: 46663100f45962c87cfd4e7c908ee23aba557f8bfe313a0eedefc59818abb96e
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://yafferge.ru/award?keyword=bhaktapur+map+pdf'. This indicates the document's primary purpose is to lure the user to a potentially harmful website. The ML classifier and ClamAV detection further support its malicious nature. No scripts were extracted, but the embedded URL is sufficient evidence of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://yafferge.ru/award?keyword=bhaktapur+map+pdf In PDF document text
    • http://nuloriwilorij.scienceontheweb.net/what_are_the_principles_of_environmental_ethics.pdfIn PDF document text
    • http://circleshtang.xyz/concert_band_warm_up_choralesasoc8.pdfIn PDF document text
    • http://shtangelkipokupkiitd.online/mugiltu0id.pdfIn PDF document text
    • http://revodegasiger.sportsontheweb.net/renaissance_italienne_architecture.pdfIn PDF document text
    • https://cdn.sqhk.co/gofelaxes/ieietPL/big_bang_theory_all_seasons.pdfIn PDF document text
    • https://cdn.sqhk.co/batumozi/dxeheia/butajixad.pdfIn PDF document text
    • http://1xbets-regs.site/694862951469llzv.pdfIn PDF document text
    • https://cdn.sqhk.co/wadelovelo/hjmPgc5/58473854860.pdfIn PDF document text
    • http://kesuvajeb.scienceontheweb.net/honda_fit_2007_battery_canadian_tire.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/dazemi/4710254147.pdfIn PDF document text
    • http://torejejowomu.myartsonline.com/el_aprendizaje_basado_en_problemas_como_tcnica_didctica.pdfIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/8013477844.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/kidasilupasotekelelukuba.pdfIn PDF document text
    • http://bivojeda.atwebpages.com/tisugaj.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/37215875649.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/mackintosh_probe_test_sample_report.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/36872622884.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/ecommerce_iphone_app_template.pdfIn PDF document text
    • https://s3.amazonaws.com/xepululejiwof/48992264161.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_off0000ce1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE1E 5184 bytes
SHA-256: 4b2337c89cf9b8b3a6ce9cb84455d6d54e46df19103f9fbb206b158aa1871b2e
font_01_sfnt_off0000df98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF98 11008 bytes
SHA-256: 6d0782e85d5632f6b2aa2fd648f5337cd8682a5d7f8a9bb369a84b08d0d3fe47

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