Malicious PDF — malware analysis report

Static analysis result for SHA-256 97bd8fa7d4ad6af7…

MALICIOUS

PDF

75.0 KB Created: 2021-02-28 14:18:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77d6988eda1c015559d903a0a4b05c8d SHA-1: da28b520c11545cea575ce399024c2f03f5f5232 SHA-256: 97bd8fa7d4ad6af72045b91e3f616857d1bde15ccdf1888988709f65e7add73e
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/123?utm_term=how+to+make+scale+factor'. This indicates the document's primary purpose is to lure the user to a potentially harmful external site. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://yafferge.ru/123?utm_term=how+to+make+scale+factor
    • https://cdn.sqhk.co/gasajolop/jYWgjIs/pexuvukadupenuto.pdf
    • http://webmastervlad.ru/fireball_anime_20204ah7j.pdf
    • http://temppicture.xyz/783259967062vohm.pdf
    • http://nefritthebestthing.site/what_produces_chlorophyll6sctr.pdf
    • https://cdn.sqhk.co/pijujuweg/cgchcu0/miweb.pdf
    • http://mnogolidov.xyz/elantra_hd_service_manualn33o8.pdf
    • https://cdn.sqhk.co/butuxolevu/Mjaxsyn/kozilapigufezigozoworig.pdf
    • http://rejinijajelu.22web.org/33229542051.pdf
    • http://disclosures.space/83094516468tm02r.pdf
    • http://itagreen.fun/vepuna4nmg0.pdf
    • https://cdn.sqhk.co/nowonipewo/jejbdJJ/turomumajajo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://mebexadesojixip.rf.gd/itunes_free_for_pc.pdf
    • https://s3.amazonaws.com/libosokune/lipexejonitatuwomebagur.pdf
    • https://s3.amazonaws.com/jedadokuti/peter_principle_define.pdf
    • https://s3.amazonaws.com/bezutu/would_you_mind_answering_a_few_questions.pdf
    • https://s3.amazonaws.com/sasufufa/logo_design_ai_template.pdf
    • https://s3.amazonaws.com/gewuwasi/78397567488.pdf
    • http://patuwovoparivi.rf.gd/nizamijevomulabivagesutu.pdf
    • https://s3.amazonaws.com/kujesulad/l_adjectif_pithte_et_attribut_exercices.pdf
    • https://s3.amazonaws.com/libusamagowuvo/apple_tv_airplay_android_app.pdf
    • https://s3.amazonaws.com/rolefosiju/carrom_board_game_for_keypad_phone.pdf
    • https://s3.amazonaws.com/zemunomipazikez/chrysler_300_srt8_performance_upgrades.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb2d.bin
a4fa644e79f17b900722762d3855475d94ca4030ccd16789a3dec0d210e3ac4c
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2D 5144 bytes
font_01_sfnt_off0000fca6.bin
6f3dfbb07d095abd46235d93b9aadb2c58df583d38b8b57746e24b9c8fd32f9b
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA6 9876 bytes