Malicious PDF — malware analysis report

Static analysis result for SHA-256 db1e6a97fe15145a…

MALICIOUS

PDF

74.4 KB Created: 2021-02-26 02:22:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 1f46bd1e886a0fc5dc80d8637656d370 SHA-1: d0a14563950ac114db0ab3057893e8bb58550143 SHA-256: db1e6a97fe15145a5ebd4d106287b73cd86a05e18b31c28748c37fe4dac31cb9
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://crophysi.ru/123?utm_term=maytag+quiet+series+100+dryer+troubleshooting In PDF document text
    • http://salonop.xyz/xosifuxarefp0nkh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491723/normal_5fe93d34f21b5.pdfIn PDF document text
    • https://bibixofepo.weebly.com/uploads/1/3/4/2/134235383/7856791.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408186/normal_603208217489b.pdfIn PDF document text
    • http://premiumpornclips.com/whatsapp_wallpaper_full_hd_lovesxgqf.pdfIn PDF document text
    • https://cdn.sqhk.co/goxejake/dgjgigg/48396498874.pdfIn PDF document text
    • http://bluhgang.best/43297284051z0zaf.pdfIn PDF document text
    • https://cdn.sqhk.co/tivinarafuvu/hgihijb/sky_roller_app_download.pdfIn PDF document text
    • http://marketitaly.pro/chernobyl_season_1_episode_2_subtitlesru34i.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490121/normal_5ff545e645b61.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/tupofelasujewas/91205414311.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/diribufosisotumodigozazek.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/20581256538.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/saeco_automatic_espresso_machine_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/bhakta_kannappa_telugu_songs_free_doregama.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_off0000e604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE604 5656 bytes
SHA-256: c25afd65187b12a3798dc00464d0350ad1bd83b41e3d3459b8414c97d73b9f18
font_01_sfnt_off0000f944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF944 10368 bytes
SHA-256: e15fe25382342b6498fa965c82c155bf8ce663167f0917337f80a89309d75712

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