Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e2507f1ea8c31e4…

MALICIOUS

PDF

74.9 KB Created: 2021-02-07 04:33:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 21ecad9bb757cb2a09e17602ca6bfb69 SHA-1: 0041a362eb3804cedc2343770c7fe03527c8201c SHA-256: 9e2507f1ea8c31e451ae7ae76afa872b1dbb159ee9bee93ead0dc231f52d121e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to link farms hosted on disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

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://leonvi.ru/aws?utm_term=instagram+stories+template+psd PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4376371/normal_5ff86a2767fa3.pdfIn PDF document text
    • http://itclick.pro/38407370834r59g7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495055/normal_5fdb6616160c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486778/normal_5fce13d6d802d.pdfIn PDF document text
    • http://national-verifyteam.com/healing_band_aid_meme_templateduuj3.pdfIn PDF document text
    • http://swiss-family.space/como_ensear_mejor_miriam_ponce_gratiswx6td.pdfIn PDF document text
    • http://metazoaapc.fun/180745778853j3qx.pdfIn PDF document text
    • http://gisisavodure.22web.org/counter_strike_1._8_tpb_pc_serial.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461498/normal_5ff938d81a1c8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sajavisazoz.epizy.com/zifib.pdfIn PDF document text
    • http://pomuvoxibi.epizy.com/50153507556.pdfIn PDF document text
    • http://jumebesatupa.epizy.com/football_maniacs_manager_mod_apk.pdfIn PDF document text
    • http://duloduxu.epizy.com/89854513754.pdfIn PDF document text
    • http://momugegunimex.rf.gd/addressing_formal_letter_to_unknown_recipient.pdfIn PDF document text
    • http://xumusuriwo.rf.gd/liledatobos.pdfIn PDF document text
    • http://jezawijevot.rf.gd/cub_scout_bear_den_leader_guide.pdfIn PDF document text
    • http://wotixoweg.rf.gd/handprint_calendar_template_2018.pdfIn PDF document text
    • http://lisuxuzilim.epizy.com/grendel_chapter_3_questions_and_answers.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_off0000e831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE831 5216 bytes
SHA-256: c61eec6304b422c18664cfccf949d4e38176a191cfe826108ab36bb1be94d171
font_01_sfnt_off0000f9db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DB 10580 bytes
SHA-256: dec3b06f980aac91e7c0550e455c6ef44df1f21d0a8a747281d4a03324e8d512

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