Malicious PDF — malware analysis report

Static analysis result for SHA-256 273991067bea1020…

MALICIOUS

PDF

65.3 KB Created: 2021-02-12 18:43:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 3c5cdfc585223c7218af8a5f4ed1c887 SHA-1: 46ab03e2f1ef6ac4e84405a40becf39365a0c4e0 SHA-256: 273991067bea102030b027afb773735124f70dad2938468d6649f034dd496829
194 Risk Score

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
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/wix?keyword=ultimate+assassin+1+unblocked In PDF document text
    • https://mafoxoluz.weebly.com/uploads/1/3/1/4/131483222/6464450.pdfIn PDF document text
    • http://dewobazul.22web.org/63201086624.pdfIn PDF document text
    • http://lalozakuren.66ghz.com/tamil_hit_album_songs_masstamilan.pdfIn PDF document text
    • https://cdn.sqhk.co/sugefixa/bpCpghg/spelling_bee_download_free_app.pdfIn PDF document text
    • http://birodavaz.22web.org/66455260924.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vusegax.rf.gd/etcher_raspberry_pi.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/age_related_macular_degeneration.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/brightness_slider_widget_android.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/sawamefesani.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/7796336856.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/98676361027.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/printable_calendar_2018_canada.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_off0000c3e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3E7 5236 bytes
SHA-256: 0968f05cc9074ee5e05aff3cab41018527064226b0907db07fb485345b36f16b
font_01_sfnt_off0000d5ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5AD 10208 bytes
SHA-256: 5387d3810dc50fd31188cd4922a001cdb9674e7df05830c68879be09c2c10ff7