Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7398b2e7506a094…

MALICIOUS

PDF

68.8 KB Created: 2021-01-02 13:16:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 73830f97fc9aa2e77fe9347cc22d44f6 SHA-1: d0f27e3a3e2f06b7f2e67e442b17f7eb35c4ee17 SHA-256: c7398b2e7506a094550677b0fa682e9e533db7440d2e4737fbf2c5e9ae6c8d1f
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The sample was flagged by a machine learning classifier and ClamAV as malicious. The 'SE_CLICKFIX' heuristic indicates a social engineering attack that prompts the user to execute a command, likely to download and run a second-stage payload. The embedded URL 'https://traffking.ru/aws?utm_term=cd+rom+driver++for+windows+8' is a strong indicator of a phishing or malware distribution attempt.

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
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://traffking.ru/aws?utm_term=cd+rom+driver++for+windows+8 PDF link annotation
    • https://cdn.sqhk.co/busosuwik/YxgihdQ/dance_emotes_battle_challenge.pdfIn PDF document text
    • https://cdn.sqhk.co/lexuxeza/Vhcjfia/lesson_plan_ideas_for_preschool_teachers.pdfIn PDF document text
    • https://cdn.sqhk.co/gikunixa/bjhgege/davogebifelobipuses.pdfIn PDF document text
    • https://cdn.sqhk.co/mofisozulud/jbjegjN/fantasy_premier_league_official_app_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413986/normal_5fe8c725b64dd.pdfIn PDF document text
    • https://cdn.sqhk.co/xumobopore/fjhgdjc/50090347280.pdfIn PDF document text
    • https://cdn.sqhk.co/lazujanaziri/cjjDhP5/roku_remote_replacement.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/banula/zebobibu.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/how_to_make_a_bambo_flute.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/killer_choy_lee_fut_form.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/chaitrada_premanjali_kannada_movie_songs_320kbps.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/battlefront_3_legacy_coruscant_fix.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/89874460631.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/aadhar_card_address_change_online_form.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_off0000cff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFF5 5060 bytes
SHA-256: 148017b2e962fde5627f839586ce3472d786ac93184009bb4763a67d5c5342d2
font_01_sfnt_off0000e131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE131 11452 bytes
SHA-256: e31ae2ab98f54bc44c9ed5366c90c88c63cfc1d09c0f324bc8949e4b5705fa1f

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