Malicious PDF — malware analysis report

Static analysis result for SHA-256 de38b3bd906a4c0a…

MALICIOUS

PDF

72.5 KB Created: 2021-04-24 17:30:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f88f653cf8529c64f1dea8587bb4378 SHA-1: d0025c547134a95ca1f808d82eabacd6b649f034 SHA-256: de38b3bd906a4c0acb8a4d87c408ac79755d2f8219b3c5e1ade45a24f6a6141e
96 Risk Score

Malware Insights

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

The sample is a PDF document that contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF as malicious with high confidence. The document body, though heavily obfuscated, appears to contain product-related text, suggesting a lure to a malicious website for phishing or malware delivery. The presence of external URIs indicates an attempt to redirect the user to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://nipisod.ru/strik?utm_term=delta+baby+floating+bath+mattress
    • http://autocredit.moscow/psychology_101_chapter_12_quiz_answersoj44d.pdf
    • https://cdn.sqhk.co/rajemaramiw/ijjjCgf/17570011264.pdf
    • http://groby-ritual.online/nibevalafoxokotesasu6frp7.pdf
    • https://cdn.sqhk.co/xelajuwodaf/dlijgRU/occupation_definition_in_economics.pdf
    • https://cdn.sqhk.co/tororukiwuri/jePsMry/pumelokodonot.pdf
    • https://cdn.sqhk.co/wapisuda/d2Ujejf/91790723230.pdf
    • http://zoompol.xyz/stone_soup_cottage_deliveryctfpt.pdf
    • https://cdn.sqhk.co/pofadugilip/fzijWvB/murivoxopewu.pdf
    • http://cadenalia.com/keystone_pipeline_map_2020ipwq0.pdf
    • http://tacfitproducts.com/how_to_work_motorola_cp200oo00o.pdf
    • http://afracheat7.xyz/60127198912770cb.pdf
    • http://fitokapss.xyz/types_of_equity_structured_productsuggos.pdf
    • https://cdn.sqhk.co/xewafazuk/iajcW9f/citylures_flights_hotels_tours_activities.pdf
    • https://cdn.sqhk.co/kawonidoza/g3SieN3/venalelajudosadi.pdf
    • https://cdn.sqhk.co/vedimofaw/hz6gjpc/extreme_car_driving_simulator_2_mod_apk_revdl.pdf
    • http://sopisafexuj.sportsontheweb.net/danalefo.pdf
    • http://stixlife.info/what_is_a_shift_in_poetryaijw6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kovilowab/how_to_turn_off_smart_call_blocker.pdf
    • http://lapetagalelan.myartsonline.com/12431238867.pdf
    • https://s3.amazonaws.com/mavixu/31540911849.pdf
    • http://sasaxunofob.atwebpages.com/present_perfect_continuous_exercises_perfect_english_grammar.pdf
    • https://s3.amazonaws.com/wuzalugiseto/wurulufuxoxuwuduvorofa.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_off0000dbf6.bin
66757f66e07a62f6cd13f4776ef3ab78b9773f9e8d370768e5d06895168c987b
pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF6 5424 bytes
font_01_sfnt_off0000ee50.bin
3f726e7f9ee446d99426516664f721ea8a86037f8e1bb833299bb9f68248bc8e
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE50 11192 bytes