Malicious PDF — malware analysis report

Static analysis result for SHA-256 eae7f3691134c72e…

MALICIOUS

PDF

84.7 KB Created: 2021-03-03 13:01:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 6c63ac0c1fae5875965b8ed405152e40 SHA-1: dbf80c8e4df5655d3c517a208453c2a0b6f3f263 SHA-256: eae7f3691134c72efafb12b42d0c53c8061de35169371d561600e3f22ab8d8ac
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains heuristics indicating it's a phishing lure, specifically using an image to redirect users to a suspicious URL. The embedded URL `https://dugedepap.ru/strik?utm_term=corsair+k95+platinum+xt+software` is flagged as a potential phishing attempt. While no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly suggest malicious intent, likely involving the download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dugedepap.ru/strik?utm_term=corsair+k95+platinum+xt+software PDF link annotation
    • http://fresh-ita.fun/18393105381cmfzo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478430/normal_5fe3332256f16.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454543/normal_5fcecf6737666.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501214/normal_5fcf7dc4d19fd.pdfIn PDF document text
    • http://rosutob.getenjoyment.net/shark_navigator_lift_away_deluxe_nv360_26.pdfIn PDF document text
    • http://dizurexemubegog.mygamesonline.org/mejuniji.pdfIn PDF document text
    • http://mir23.xyz/hole._io_local_multiplayer_gonegmbm1.pdfIn PDF document text
    • http://gefosezidubajoz.scienceontheweb.net/whirlpool_4.3_cu._ft._top_load_washer_reviews.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jezevenakos.myartsonline.com/viwuvajegamodujixigimomap.pdfIn PDF document text
    • http://xowobovu.myartsonline.com/41251807847.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwuzerijofa/campmaster_caravanner_10_man_tent_instruction_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/58405563077.pdfIn PDF document text
    • https://s3.amazonaws.com/nisiwanolom/lutuxazuwelanomuvirodake.pdfIn PDF document text
    • https://s3.amazonaws.com/zafirawit/siradagetef.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/51011725972.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010fbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FBE 5456 bytes
SHA-256: 488246e43f69d1b3adc5cf310610334514ba67fab85399bae884233aaa4f455a
font_01_sfnt_off0001224e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1224E 10412 bytes
SHA-256: 3f97ada23f200991b9deeb4de41c21e3c8e5811adb2f4078d525a950488c5dd9

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