Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f49a17064079519…

MALICIOUS

PDF

83.1 KB Created: 2021-01-06 14:10:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: e1cc8eb3d1b13319c74ca1642e3bc70b SHA-1: d53b8f331ca8968f00a20971524ebf11e106fa6a SHA-256: 5f49a170640795193f08de8593831951de2eafa53bc22d7889ca63199a880a40
214 Risk Score

Malware Insights

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

This PDF file contains numerous links to external websites, including a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'cyberbullying word find answers'. The presence of multiple embedded links and the ML classifier's high confidence score indicate a phishing or scam attempt designed to redirect users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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=cyberbullying+word+find+answers In PDF document text
    • https://kinumonitebira.weebly.com/uploads/1/3/4/6/134605003/6597312.pdfIn PDF document text
    • https://cdn.sqhk.co/baxemazisod/gfwoWft/smith_s_electric_knife_sharpener_instructions.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/ijjbjiK/programming_languages_for_browser_games.pdfIn PDF document text
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/7292536.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376382/normal_5fcb66a73d982.pdfIn PDF document text
    • https://cdn.sqhk.co/wirowanorax/1HjhtIO/72054416580.pdfIn PDF document text
    • https://cdn.sqhk.co/wunokebewoz/NidKGE6/best_escape_proof_cat_harness_and_leash.pdfIn PDF document text
    • https://cdn.sqhk.co/nozujeraguje/x9Mgj9S/download_game_cyberfoot_soccer_manager_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/gipirukanut/ghji8gd/rugonawuriwevolomoxaki.pdfIn PDF document text
    • https://suvosimi.weebly.com/uploads/1/3/4/6/134688706/9991737.pdfIn PDF document text
    • https://xuwuperozaposa.weebly.com/uploads/1/3/2/3/132303395/4694705.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/sajatesawodiji/lego_worksheets_for_preschoolers.pdfIn PDF document text
    • https://s3.amazonaws.com/wovisak/chiari_malformation_uk_sites.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4B 5236 bytes
SHA-256: 6d99cd3af4fbc049b29d2f974badb52b2e1c1d9ae421fdbf28a9600867548a51
font_01_sfnt_off00010d36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D36 10560 bytes
SHA-256: 015dad7291b4882367ffef97ebd26e04614e0300befecf25cd91e4219cd82d2f
font_02_sfnt_off00013170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13170 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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