Malicious PDF — malware analysis report

Static analysis result for SHA-256 754ad3505805021d…

MALICIOUS

PDF

83.9 KB Created: 2021-05-15 00:12:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: aaab8f485c5ce4f4537bfaff16cbf1c1 SHA-1: d4879460427edd5a70a8c9a38bc96dcc38377a2b SHA-256: 754ad3505805021dffe45cd149dae02336b4b5d3285ff1c0234d4d10e86c9e7e
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, pelibifir.ru, which is likely used to host a malicious payload or redirect to a phishing site. The PDF's content, though heavily obfuscated, appears to reference 'Joe's crab shack menu prices pdf', suggesting a lure to trick users into downloading or interacting with the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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.
  • 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://pelibifir.ru/strik?utm_term=joe%2527s+crab+shack+menu+prices+pdf PDF link annotation
    • http://zotoxilob.getenjoyment.net/star_wars_ahsoka_book_barnes_and_noble.pdfIn PDF document text
    • http://jejidizifobimir.iblogger.org/jefelawavinotapije.pdfIn PDF document text
    • http://linodogeb.scienceontheweb.net/bodyboss_ultimate_body_fitness_guide_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/lisupixiwe/hbhgIjc/rupafiwes.pdfIn PDF document text
    • https://cdn.sqhk.co/falupuvevore/Fhgjcic/battle_tank_nintendo_entertainment_system_nes_rom.pdfIn PDF document text
    • https://cdn.sqhk.co/vopofuxo/Frjp3ia/11106694410.pdfIn PDF document text
    • https://cdn.sqhk.co/zapimafe/iha9yZS/police_officer_killed_in_st_louis_2019.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/821ab440-7314-48a9-b9ca-736dc221a189/nenikajopidatugejipa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84ae6d34-8f43-4dde-8709-41d30dd962fa/bollywood_dance_songs_2020_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb579e7e-d1dc-4e0e-bebc-1a32f23b6f4d/99189998169.pdfIn PDF document text
    • http://puxetedategekex.epizy.com/53050240146.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9c2cefc-7a6a-4359-91bb-70c940f27861/fiwiwuterejasi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cf6e30e-c583-44dd-8616-2268b71d51b4/82230391947.pdfIn PDF document text
    • http://velumosak.epizy.com/iphone_8_notification_sound.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e7230c0-5e3e-4366-9857-e0dad22511c1/18326526103.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1402dba9-cbe4-412b-a7a4-f5c77d9b605c/new_yorker_radio_hour_podcast_npr.pdfIn PDF document text
    • http://pakebixulo.epizy.com/how_much_is_the_richest_person_in_dubai_worth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c44469eb-8816-4c28-962d-4ef1f6d8d8b4/lenifadigejivo.pdfIn PDF document text
    • http://batapijas.myartsonline.com/vocabulary_in_use_upper_intermediate_advanced.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6647511d-161b-4a6c-ac0c-118b9b6ef01d/89130238632.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4df2c5f9-403e-453f-897e-cf29511c4f7b/5021646490.pdfIn PDF document text
    • http://lutepotazor.onlinewebshop.net/curso_de_introduo__economia_poltica_singer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec6b3c26-14aa-4f81-8ab4-838c23cfa91c/25830280256.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_off0000f755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF755 5392 bytes
SHA-256: bface6a9ce0670ab2eec8902ffed342caa2d6a244fae91f25c0c305977c0f5b4
font_01_sfnt_off00010976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10976 12436 bytes
SHA-256: d1ed84b417973d2bf6bc677e75d343a1cfed310115978bb5a593a4eadfe3a4cc
font_02_sfnt_off0001322f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1322F 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34