Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b502596dfe84283…

MALICIOUS

PDF

74.6 KB Created: 2021-02-08 09:09:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 9003a2d30219256a871a2d918d923926 SHA-1: 9159e0e62a3f8272333d4af45db8572d748da887 SHA-256: 6b502596dfe8428383f300a5b1a33cd5e9558f49c6b20901cb62069899015f85
184 Risk Score

Malware Insights

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

The PDF contains embedded links to known malicious redirectors and disposable hosting, indicating an attempt to lead the user to harmful content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a common tactic of luring users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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 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.
  • 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://crophysi.ru/wb?keyword=libertango%20piano%20sheet%20music%204%20hands In PDF document text
    • http://kameregeperiwaz.22web.org/17260857720.pdfIn PDF document text
    • https://sujofunipus.weebly.com/uploads/1/3/4/5/134502209/gebufemadumaginifeso.pdfIn PDF document text
    • http://tazijiga.22web.org/aladdin_2019_legendado_mega.pdfIn PDF document text
    • http://xarubuxa.iblogger.org/gb_whatsapp_pro_v8._00_apk.pdfIn PDF document text
    • https://mebugiroxubo.weebly.com/uploads/1/3/0/7/130776511/3802342.pdfIn PDF document text
    • https://bufogepuvuzi.weebly.com/uploads/1/3/1/3/131381066/ae2d43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416150/normal_5fd2f5666fab5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449998/normal_5feb032e88eb5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463286/normal_5ff765eb3fdf0.pdfIn PDF document text
    • https://vafomelopujoxo.weebly.com/uploads/1/3/4/8/134864043/1dde734e11c8.pdfIn PDF document text
    • http://wanasuj.22web.org/23096601975.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rejefuwozumij.rf.gd/pigegajofegusagula.pdfIn PDF document text
    • http://tixelupaninaber.rf.gd/53127358179.pdfIn PDF document text
    • http://pigibotokaper.epizy.com/2392755064.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/ritajajorugoleweferi.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/85152426054.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/videruxufawipededafu.pdfIn PDF document text
    • http://wuparol.epizy.com/android_emulator_run_app_from_command_line.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/baghban_movie_all_songs_free.pdfIn PDF document text
    • http://mujedofagogi.epizy.com/wufawukefig.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/calefont_splendid_10_litros_tiro_forzado_manual.pdfIn PDF document text
    • http://vakutasuv.epizy.com/banomoya_amapiano_mix.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_off0000e381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE381 5624 bytes
SHA-256: 3d6d3353af3a48444995d0c6d5f2f7a873c04f6b05a1352ce93d6f98581c8590
font_01_sfnt_off0000f679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF679 10872 bytes
SHA-256: bdf41709a7e611b5c985f91fc719a118c25c0fa3286e83926b57ce08a3bc28a5

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