Malicious PDF — malware analysis report

Static analysis result for SHA-256 93e66e6ed398a32e…

MALICIOUS

PDF

77.4 KB Created: 2021-03-03 08:54:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 2ed20391a873ea538bc3e2738342ce66 SHA-1: 58cfc16ac4f8abaa2c7c7136a1c2aa1de521af2f SHA-256: 93e66e6ed398a32e481bb580b683ea3919b8d857a61bd9c9a566d07170321f1d
126 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous links to disposable domains, suggesting a link farm or redirection scheme to host malicious content. The document body, though heavily obfuscated, appears to be a lure related to 'world war one guided reading', likely to trick users into clicking the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://fokemale.ru/wix?keyword=world+war+one+guided+reading PDF link annotation
    • http://idealicaitaly.site/graco_snugride_35_click_connect_manualnsnfm.pdfIn PDF document text
    • http://lavkavkusa.store/flysky_fs-gt3b_transmitter_with_receiver44rgt.pdfIn PDF document text
    • http://christinaanddavid2019.com/arihant_sample_papers_class_12_accountancygh320.pdfIn PDF document text
    • http://edarudost.online/nostalgia_ice_cream_maker_at_walmartio5xj.pdfIn PDF document text
    • http://rivozuzeno.mywebcommunity.org/smart_wristband_4_manual_espaol.pdfIn PDF document text
    • https://cdn.sqhk.co/komagiju/sjjbUaQ/23474209091.pdfIn PDF document text
    • https://cdn.sqhk.co/xonipavu/2ZijvVx/98531369611.pdfIn PDF document text
    • https://cdn.sqhk.co/rubupidorinu/jahesjh/glow_drawing_board_3d.pdfIn PDF document text
    • https://cdn.sqhk.co/mofekuma/9ifjfic/ice_princess_lily_2019_cast.pdfIn PDF document text
    • http://itclick.pro/best_browser_to_videos_on_iphoneokwwd.pdfIn PDF document text
    • https://cdn.sqhk.co/momujolo/qnPOEig/repuxasajukepesafasimi.pdfIn PDF document text
    • https://cdn.sqhk.co/pirujezexod/viecXha/48132906110.pdfIn PDF document text
    • http://zujavok.22web.org/wise_mans_fear_publication_date.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/mukut/femovu.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/brush_photoshop_cs6_pack.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/4106387541.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_off0000f534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF534 4920 bytes
SHA-256: bb79bebe8096b0cf12321f590022a640e8ea2f0d1f950dfc31c72c31bfadd90b
font_01_sfnt_off00010615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10615 10140 bytes
SHA-256: e5244292a8144e4f8592ae40820d39a45f63cb44952b2aa903946ab203b91f37

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