Malicious PDF — malware analysis report

Static analysis result for SHA-256 9121a86a2c6fd394…

MALICIOUS

PDF

90.3 KB Created: 2021-01-24 18:33:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: de41c2d4afda33dd0ba23cd679a7543e SHA-1: e70f4e406928846ee7ff3ed9f699a234038b186c SHA-256: 9121a86a2c6fd394f2e795923e1a555e385d47853839eb59c50b96e3621cc355
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and exhibits characteristics of a phishing lure, specifically using an SEO redirector to disguise the download link. The ML classifier also strongly indicated maliciousness. The embedded URL points to a redirector, likely intended to lead the user to a malicious download or exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://trafficel.ru/123?utm_term=bloons+td+xbox PDF link annotation
    • https://cdn.sqhk.co/penomufepuk/hj8jfgj/mogawofuwure.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464542/normal_5fdb3b7915e24.pdfIn PDF document text
    • https://cdn.sqhk.co/kisesawaropo/z9BDjgW/screen_recorder_v_recorder_con_audio_video_editor.pdfIn PDF document text
    • https://cdn.sqhk.co/dufelogaruf/reHThbl/xoxuzakawagupimakorediso.pdfIn PDF document text
    • https://cdn.sqhk.co/pumopijaku/gfbijhj/lomepuf.pdfIn PDF document text
    • https://cdn.sqhk.co/ponesigis/jdiaTBi/49259250445.pdfIn PDF document text
    • https://cdn.sqhk.co/levowexesu/lha9fhh/live_football_tv_euro_app_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/tasokuxu/oQDhcgd/goleduxigemivebad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493891/normal_5fdbdafcdff89.pdfIn PDF document text
    • https://cdn.sqhk.co/bojojiweg/e8idUgf/dideragivazi.pdfIn PDF document text
    • https://cdn.sqhk.co/mewedenemez/gjAgjwS/49330797038.pdfIn PDF document text
    • https://cdn.sqhk.co/solumapidema/RU08tWT/kibeduk.pdfIn PDF document text
    • https://cdn.sqhk.co/nolagutotato/gif0Jji/wevuvinelunewavanikokegu.pdfIn PDF document text
    • http://kivedunorujuw.66ghz.com/vaxipenidabaroleselu.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/pokixovuxik/ccna_notes_with_practical_in_english.pdfIn PDF document text
    • http://wolaniloko.epizy.com/trust_deed_format_for_ngo.pdfIn PDF document text
    • http://jojudodadanu.epizy.com/fajuvewez.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000117af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117AF 4392 bytes
SHA-256: b28d79972b1be6087a92cf67b5cb12d2e5a90b78f4ca9eacc8ea4ff04e157e9b
font_01_sfnt_off000126a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126A7 11528 bytes
SHA-256: 20bb2727ec622f43279534aae71820382cd195265fd37c00e3e51a646b158ba0
font_02_sfnt_off00014dd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DD4 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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