Malicious PDF — malware analysis report

Static analysis result for SHA-256 c33e93e75cab1de3…

MALICIOUS

PDF

71.5 KB Created: 2021-02-19 21:24:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 57cd5c4f11d670ae408d8eec621ab67b SHA-1: e2dd8a89ed3dd0fcee9c24f75b528842440dcacc SHA-256: c33e93e75cab1de323dd6f5970fbb8ce2cc8531cb477ffef3cb0638ac0b1a71a
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://crophysi.ru/strik?utm_term=surah+pendek+juz+amma+mp3'. This URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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/strik?utm_term=surah+pendek+juz+amma+mp3 In PDF document text
    • https://cdn.sqhk.co/lufezeralon/Sjdxsii/ludo_game_online_offline_multiplayer.pdfIn PDF document text
    • http://3203epworthcres.com/unanswered_call_messagef1f4m.pdfIn PDF document text
    • http://debesur.iblogger.org/howrah_bridge_movie.pdfIn PDF document text
    • https://cdn.sqhk.co/pubamegumox/hgAOjde/pac_box_office_tulsa.pdfIn PDF document text
    • https://cdn.sqhk.co/tilomulobet/ehgjiIp/galaxy_attack_alien_shooter_pc_indir.pdfIn PDF document text
    • http://bestita.space/lemotid4zobd.pdfIn PDF document text
    • http://meetporte.xyz/folusabiwupasatohvh.pdfIn PDF document text
    • http://chunyoo.com/linear_inequalities_worksheet_gina_wilsonxh3bq.pdfIn PDF document text
    • https://cdn.sqhk.co/kovezozeseg/Wt2r8ib/picsart_editing_background_wallpaper_hd.pdfIn PDF document text
    • http://rostov-mobile-doctor.ru/lodger_agreement_template3hsgm.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/fowonaxul/ifrs_pocket_guide_2019_pwc.pdfIn PDF document text
    • http://rovetenexosa.rf.gd/45279439390.pdfIn PDF document text
    • https://s3.amazonaws.com/gazivemon/toputegatalopexumitigoze.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/business_income_tax_computation_format.pdfIn PDF document text
    • http://jilagikudi.rf.gd/tabbed_activity_android_studio.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/presentation_templates_business.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/tv_guide_listings_mesa_az.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/drug_metabolism_and_pharmacokinetics_quick_guide.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d15b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD15B 5448 bytes
SHA-256: bf006ad6482c7d97d12a201a81add1bac16e3e5d00f68b4d4ee5289ea55fdfb2
font_01_sfnt_off0000e3be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BE 2004 bytes
SHA-256: 1ccfdb965ac1c7a735855f6c27e3edda1425c3432a388fdbc3eb9e884b12240a
font_02_sfnt_off0000ed55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED55 10296 bytes
SHA-256: 28b4b9c5ad452e36cde51721d2f052130420e934e489843149e581e2191ab1a5

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