Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b930b8454208b40…

MALICIOUS

PDF

89.4 KB Created: 2021-03-14 09:10:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8dcdec498d3c487ba8944473b9d18298 SHA-1: 27c50100c51322f0b9622d8a8f50bc984a7657bf SHA-256: 4b930b8454208b40f8cadeb1d9afc6e1614e936f76c804f9cc38e9a43c56fc66
136 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://crophysi.ru/wix?keyword=the+genetic+code+biozone+answers PDF link annotation
    • http://xasumemazekejo.scienceontheweb.net/givisewejepujapidumuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476595/normal_60275fdfb53f2.pdfIn PDF document text
    • http://tewatag.medianewsonline.com/hp_8620_printer_dimensions.pdfIn PDF document text
    • http://scotiaenlineape-personas.com/21392890744wj0mu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422161/normal_5fd647780f4ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447874/normal_602bf52868b04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471514/normal_603c6d7bdc8b1.pdfIn PDF document text
    • http://fusekimutoxi.sportsontheweb.net/casebook_of_sherlock_holmes.pdfIn PDF document text
    • http://com-login8.xyz/irumudi_kattu_sabarimalaikku_tamiluz61l.pdfIn PDF document text
    • http://wotaxatumumodok.sportsontheweb.net/how_to_get_vrchat_avatars.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464052/normal_6045026ed6213.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/zuniverijesud/92326392945.pdfIn PDF document text
    • http://jedenibiripo.epizy.com/day_to_day_timetable_template.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/wonder_figurative_language_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/yard_machine_46_inch_riding_mower_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/choice_of_super_fund_standard_choice_form.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/fireman_sam_cartoon_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/monster_hunter_ancient_leshen_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/ziwuvijevo/is_burning_500_calories_a_day_enough_to_lose_weight.pdfIn PDF document text
    • http://rasinizewubegeg.epizy.com/anjathey_tamil_audio_songs.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_off00012076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12076 5400 bytes
SHA-256: 9c90ac9fad48cbdda03dcd1511c2cd71261483a47401237c3b9360ef7495cb8d
font_01_sfnt_off000132ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132EA 11024 bytes
SHA-256: 7c4752cac232bc5eb8075b0ff1d2d1f6eb4762633867aa846676f0f8818a6473