Malicious PDF — malware analysis report

Static analysis result for SHA-256 278174bb808a8e63…

MALICIOUS

PDF

69.5 KB Created: 2021-01-15 21:50:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 4b1cc2c19613bf73c3a02dec470fd9e1 SHA-1: 0dd6f93260dab7357d84b4a8f053e8e3279bfb01 SHA-256: 278174bb808a8e6326bad193ce078469e4c5009bfe5cbf5f2f44886d6598260d
222 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the ML classifier strongly indicate malicious intent. The document body, though heavily obfuscated, contains strings related to drivers, suggesting a lure for malicious downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cctraff.ru/123?utm_term=nvidia+quadro+k4000+driver In PDF document text
    • https://mexukisigugat.weebly.com/uploads/1/3/4/7/134702857/9a00bc12779461c.pdfIn PDF document text
    • https://cdn.sqhk.co/wikelere/3jj6p7M/2_players_free_games_ps4.pdfIn PDF document text
    • https://cdn.sqhk.co/borefigux/chchehi/34885311610.pdfIn PDF document text
    • https://tigelulipuneve.weebly.com/uploads/1/3/4/7/134746657/2147315.pdfIn PDF document text
    • https://cdn.sqhk.co/kokuxisa/ha84f59/ea_sports_ufc_3_heavyweight_roster.pdfIn PDF document text
    • https://cdn.sqhk.co/kusewupudin/fhchf40/billie_eilish_bad_guy_cover_song.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/kalanejaxutilif/wexalifajadavib.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/fajumevebe.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/17610192082.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/amazing_wallpaper_for_desktop_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/jasimukebimajuzujadego.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/65085587690.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/aleatory_contract.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_off0000d4c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4C9 5060 bytes
SHA-256: 8fd0f0744a4779ed570d979af7207ac712e0aa1e973719e1f02c1cc6a16b1c34
font_01_sfnt_off0000e620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE620 10416 bytes
SHA-256: 79a1f05482494e96d744d61c2b7824dc6f01dc2029b9c78bd11e54d840baeefe

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