Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3e03d22923fdbfd…

MALICIOUS

PDF

73.4 KB Created: 2021-01-24 13:20:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 9c2eefc7f3116aaa6294f95bb4c4db43 SHA-1: 255ab12b18c1d6825c1da5ed4307ead1b344482a SHA-256: e3e03d22923fdbfd07231411c81477a3c9928b49caf0312273e910b6c0967a21
166 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm and containing suspicious, invisible links to external domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded URLs point to domains known for hosting malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://bologen.ru/aws?utm_term=telephone+billing+system+project+report+pdf PDF link annotation
    • http://simcars.ru/megumerapape4lo8m.pdfIn PDF document text
    • https://cdn.sqhk.co/bezorufuv/chiSKjh/teachers_federal_credit_union.pdfIn PDF document text
    • https://cdn.sqhk.co/lisesemafo/hbibhar/premium_wordpress_themes_for_blogs.pdfIn PDF document text
    • http://twoup-viktoria.online/2020_election_map_live_updates_by_county4orsf.pdfIn PDF document text
    • http://zedukibawubige.22web.org/31493164833.pdfIn PDF document text
    • https://galibemad.weebly.com/uploads/1/3/1/8/131856827/fda3fa36d8f.pdfIn PDF document text
    • http://xavelodezazil.iblogger.org/twisted_metal_black_ps4_trophy_guide.pdfIn PDF document text
    • http://shopsmmv.site/jungle_adventure_game_download_javagtema.pdfIn PDF document text
    • http://managerprogram.live/pabirukobakonosinuloxou0ufi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388037/normal_5ff802ef2404a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493579/normal_5ffeb30ba329d.pdfIn PDF document text
    • http://bedebatosisazov.22web.org/bumblebee_song_transformers.pdfIn PDF document text
    • http://endi-itali.space/logo_maker_and_logo_creator_pro_mod_apkfccvy.pdfIn PDF document text
    • http://bawoputameded.iblogger.org/embed_power_bi_report_in_sharepoint_2013.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://luwulifinuneti.epizy.com/la_la_la_song_320kbps.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_off0000e128.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE128 5624 bytes
SHA-256: f2e102278ee98233d134cb31666f4df2d271440273aabcf4b51015d17a96bde2
font_01_sfnt_off0000f42c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF42C 10628 bytes
SHA-256: df9522ef5a39e73023ccb06bc7ee2a09e46070a45d0b1730e114499d30379b14

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