Malicious PDF — malware analysis report

Static analysis result for SHA-256 292b5978cd8da25f…

MALICIOUS

PDF

91.2 KB Created: 2021-03-24 10:19:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: fd3fc03f1b602cb31e088510af35e7e0 SHA-1: b9180fecd54454a15773c79770171e3e77aa858e SHA-256: 292b5978cd8da25f2cd93ccc3adc2694f77e95c8b00e949de0434d1076054277
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 is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to 'dmv learners permit book pdf dc'. The presence of numerous links to disposable hosting further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://dafemum.ru/award?keyword=dmv+learners+permit+book+pdf+dc In PDF document text
    • https://cdn-cms.f-static.net/uploads/4428331/normal_6016b903811e6.pdfIn PDF document text
    • http://wspring.space/xepofawukowowuwcfk6g.pdfIn PDF document text
    • https://cdn.sqhk.co/vemegunir/a78auge/best_video_player_for_android_phones.pdfIn PDF document text
    • http://novijixonusasu.mywebcommunity.org/jinitoxasijubagew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387035/normal_601966e0b5c86.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403816/normal_5ffc8875653df.pdfIn PDF document text
    • https://cdn.sqhk.co/rorajakura/UShahhd/cardi_b_ring_song_mp4.pdfIn PDF document text
    • http://wide-do.top/adventure_of_tintin_dual_audio_720pincyi.pdfIn PDF document text
    • https://cdn.sqhk.co/tazifawixax/5wwYicq/color_by_number_glitter_coloring_book_girly_color.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388158/normal_5fed105c11054.pdfIn PDF document text
    • http://silvanozito.online/access_vba_programming_for_dummiest75zq.pdfIn PDF document text
    • http://rivalo130.com/fumazivibegesuklwxz3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383568/normal_6053ca3ed0289.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458840/normal_604de1317f648.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f9db735-14f8-4a7e-b516-b5884eaebe2a/how_to_factory_reset_asus_tm-ac1900.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/102773ca-0396-4467-b619-3c352c98b05d/78012293884.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6659c4ac-8183-4c09-8962-53c2eea43702/35000689008.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f455545d-9136-449b-b095-fa9aced929fa/is_there_going_to_be_a_dork_diaries_16.pdfIn PDF document text
    • http://vunonam.atwebpages.com/how_to_test_salt_brine.pdfIn PDF document text
    • http://kopolug.myartsonline.com/kenmore_refrigerator_ice_maker_not_working_no_water.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5636a830-31a1-46e9-be07-5cbd7b71ab4e/french_grammar_rules.pdfIn PDF document text
    • http://jutagejefutix.atwebpages.com/what_is_the_grounded_theory_equivalent_of_case_node.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B1 7916 bytes
SHA-256: f3ab0e4d55b5834cc4bea6d366112cfde16f3969bfd3b2e87d79952e2a479afb
font_01_sfnt_off00011710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11710 3076 bytes
SHA-256: 432f4d2af3b1e55d96bba9c1f181e1a4639b4d53157f6f9453dabfc44304f114
font_02_sfnt_off00012205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12205 5564 bytes
SHA-256: 1e858763cf8ba0a3e6b29f65f9984456ebf2a34d47ac04bba10535f0411701ef
font_03_sfnt_off000134e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134E4 12488 bytes
SHA-256: 5354ab44e965e4d6120fd0a73b3354a2b29f47ef0ad319959f1bc1c20e199e0f