Malicious PDF — malware analysis report

Static analysis result for SHA-256 43181096938949fa…

MALICIOUS

PDF

74.3 KB Created: 2021-03-17 23:54:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9103f5116284a9b8b4f6c81a17324a12 SHA-1: 9659e589e50d4ffd4445cb83068c9837fb877249 SHA-256: 43181096938949faf0ca4315d3a261a89101105854cdc0895f669d3a7e5d0ae6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://resalured.ru/wix?keyword=destructive+wave+dndbeyond PDF link annotation
    • http://worldworkbook.com/cash_app_mod_apk8v1j2.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuwutitaw/iAaQhdQ/highway_to_heaven_song_lyrics.pdfIn PDF document text
    • http://gobigs.space/request_to_review_cctv_footage_formgrwh9.pdfIn PDF document text
    • https://cdn.sqhk.co/winelolibug/pdknHhc/auto_merchants_plano_inventory.pdfIn PDF document text
    • http://kulapub.22web.org/11995268242.pdfIn PDF document text
    • http://okstore.info/383535114926039m.pdfIn PDF document text
    • http://blockingscenery.com/best_free_couples_counseling_near_mezvs46.pdfIn PDF document text
    • http://agent-ritual495.online/bajonegdtssi.pdfIn PDF document text
    • http://fevozogu.iblogger.org/arbor_michigan_weather_report.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/zedilegol/57161983258.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/maxasuvup.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/captivate_for_instagram_free.pdfIn PDF document text
    • http://fuzonojidufube.epizy.com/30835899782.pdfIn PDF document text
    • https://f6e2a16f-d004-42cd-8f17-0463e090774c.filesusr.com/ugd/c70c35_20cea0ce31e341a898b7c47beae323c3.pdf?index=trueIn PDF document text
    • https://d23eb412-52e1-45ef-a32a-0c032022daee.filesusr.com/ugd/03485a_ba44f6dfdb0c425799d2243deee453a3.pdf?index=trueIn PDF document text
    • http://xesufarojix.epizy.com/tagonolusalelufetitake.pdfIn PDF document text
    • https://s3.amazonaws.com/nevowimo/21481516676.pdfIn PDF document text
    • http://sonowodiguvab.epizy.com/mosis.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_off0000e481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE481 5292 bytes
SHA-256: 745d95d928cae33158926f5fd5b22c683792a94623781ebcc127ab1c6ce5aa34
font_01_sfnt_off0000f6a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A9 11088 bytes
SHA-256: b33cd2d2df7ecd03d08774b8a23984352bbecbf58cb503ca2f5addbbc5c073b5