Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c3da0aa5674e7d7…

MALICIOUS

PDF

69.7 KB Created: 2021-03-21 01:12:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 8932cdebc38232f31eef2f5aee3ca6f7 SHA-1: 4667dbbcb653c6b9c01a5647ebda793acf1a52a4 SHA-256: 1c3da0aa5674e7d7885493911de2df8daa77e4c95ae6e0e1fa7c13413bbba410
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised with a Minecraft-related keyword, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded malicious URL suggest it's designed to redirect users to a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://yafferge.ru/wix?keyword=how+to+downgrade+minecraft+pocket+edition In PDF document text
    • http://gsmall.space/82643593333ym9v0.pdfIn PDF document text
    • http://ita-bio.fun/space_oddity_sheet_music_pianokcyyz.pdfIn PDF document text
    • https://cdn.sqhk.co/zikegasenar/gejhqJE/xarabilamuvagabejivizafen.pdfIn PDF document text
    • http://talkme-news.info/potential_and_kinetic_energy_workshekqud6.pdfIn PDF document text
    • https://cdn.sqhk.co/zogameva/gkjfJ9z/zuwepumit.pdfIn PDF document text
    • https://cdn.sqhk.co/baxijaxazixi/v5hcKF0/bufadilamega.pdfIn PDF document text
    • http://wowit.pro/joxulgbl7f.pdfIn PDF document text
    • http://bionatur.space/voxefireruzukosixenofasiwyrg.pdfIn PDF document text
    • https://cdn.sqhk.co/patizuruf/bicCCWt/xizupadafimi.pdfIn PDF document text
    • http://static-start.top/kufoso7q3im.pdfIn PDF document text
    • http://legendnat.space/10477048014dgdro.pdfIn PDF document text
    • https://cdn.sqhk.co/pavoraxebute/jes9hi2/cool_lock_screen_wallpaper_iphone_6_plus.pdfIn PDF document text
    • http://drnextact.xyz/70186458598fsgmm.pdfIn PDF document text
    • http://nextauto02.ru/how_many_wars_has_america_been_in_since_17762iohl.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/fakuguvil/xemipipo.pdfIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/best_used_cars_under_30000_consumer_reports.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af344afc-886d-4621-bb47-7baa40defaf0/why_is_my_printer_not_printing_words.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/mipagutinozawupuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/800cce4c-a6c3-41e3-aca4-275c3ce42f39/kikikutidopakaxokiwab.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/lurazuxenilopetuteg.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/bissell_green_machine_cleaning_fluid.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_off0000d053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD053 5384 bytes
SHA-256: 82509a9334c346f1b441e67fdd611ae043436cf3064b9cd34014531ecf1e60d2
font_01_sfnt_off0000e2a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A9 11332 bytes
SHA-256: 63e4e5f75e9446389fde78fedc464602d29061c0542fe0c0884ffdc4a4f29419

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