Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca4f94a30de37313…

MALICIOUS

PDF

75.7 KB Created: 2021-03-14 11:12:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 502445ba27dcb86de1d32a047b5f73fd SHA-1: 23fce7fe9bb80c3d6080d765710d9e4cebd3697c SHA-256: ca4f94a30de373131acf72e4691923bce98e98653afab35b35867335f37cc1c5
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or malware distribution attempt. The document body, though heavily obfuscated, suggests a lure related to 'sheet music', directing users to external URLs. The presence of numerous external links, including a 'link farm', strongly suggests an attempt to redirect users to malicious sites for further exploitation or payload delivery.

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
  • 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.
  • 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://mezovuduw.ru/123?utm_term=homesick+dua+lipa+sheet+music PDF link annotation
    • https://cdn.sqhk.co/boxokozofe/hbdiiLa/liwepolujoputugozoj.pdfIn PDF document text
    • https://cdn.sqhk.co/tapuvimixaxo/eFCgfKY/minecraft_exploration_worlds.pdfIn PDF document text
    • https://cdn.sqhk.co/tusujoxaseru/jdjanhj/home_depot_paint_sprayer_reviews.pdfIn PDF document text
    • https://zipuwuxa.weebly.com/uploads/1/3/4/3/134376087/b1c1097e50e.pdfIn PDF document text
    • https://tabivivefevevu.weebly.com/uploads/1/3/4/8/134889686/bofijukuzukuw_dowerigawevataz_sidaxagurasoxub_nibexavaguw.pdfIn PDF document text
    • https://cdn.sqhk.co/revipidamog/jhaFigJ/rave_panic_button_louisiana.pdfIn PDF document text
    • https://cdn.sqhk.co/gebemiwisero/qYgixie/dead_kennedys_chickenshit_conformist_tab.pdfIn PDF document text
    • https://cdn.sqhk.co/lerutefo/hriaBhb/nipufedibofebiwuvonaxago.pdfIn PDF document text
    • https://cdn.sqhk.co/wojipezusax/Oijdgi4/download_cross_wallpaper_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/dazenolaxuj/f6gjShh/nukuvakowikuze.pdfIn PDF document text
    • https://fomilapemarujan.weebly.com/uploads/1/3/0/8/130814088/sotupetodup.pdfIn PDF document text
    • https://cdn.sqhk.co/tevosenijosu/cghk5wS/82721610704.pdfIn PDF document text
    • https://keberalu.weebly.com/uploads/1/3/4/7/134725283/talaxulodovura.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/muvevanepen/manchester_piccadilly_to_euston_platform.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5e5139f-fecd-476b-a508-8eca0d29aa65/how_do_i_fix_my_hp_ink_system_failure.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxuxemu/87532778135.pdfIn PDF document text
    • https://s3.amazonaws.com/wovisak/nuclear_decay_chain_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c357a45f-76f4-4941-867c-d27eb7e82aa9/pobejusalovaki.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/sesojutiwu.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/73579826680.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/713d7a3d-7c52-4a9a-acff-3378dc988158/how_do_i_setup_a_hotspot_on_my_verizon_iphone.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_off0000ebf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF3 5240 bytes
SHA-256: 9ba968257a616decd0ed9723fa47397a47f5d74b3019b9cc34394a21429d960c
font_01_sfnt_off0000fd9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9B 10636 bytes
SHA-256: d4694048007a4ce17c2267cf58f8327b81929e1df585dce8cadb8ba68d8b925f

Open this report in the interactive analyzer, or submit your own file for analysis.