Malicious PDF — malware analysis report

Static analysis result for SHA-256 9392e0d624fa6481…

MALICIOUS

PDF

79.8 KB Created: 2021-02-26 14:40:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 36f463c16f36a4140bbf58ce288de560 SHA-1: 3a4aaa148ff6c2ee1e9a904153aef57dc8bf18f2 SHA-256: 9392e0d624fa6481768885e67a54e17c374dbbf902db53cc7a0ad2692aa6bef8
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many hosted on disposable domains, and one specific URL is presented as a search result. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were extracted, the structure and URL patterns are consistent with a malicious PDF designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://fokemale.ru/strik?utm_term=can+you+use+normal+sd+cards+in+ps+vita PDF link annotation
    • http://playmarket-online.com/71480735272d85xl.pdfIn PDF document text
    • http://desokore.medianewsonline.com/sketchbook_brushes_free_download.pdfIn PDF document text
    • http://suboxobuwofum.iblogger.org/84085639889.pdfIn PDF document text
    • https://cdn.sqhk.co/rukeditele/1WhdtHR/naxalotukeresala.pdfIn PDF document text
    • https://cdn.sqhk.co/kajipazuto/gdibWov/30952380929.pdfIn PDF document text
    • https://cdn.sqhk.co/fotajoge/miaDeg7/modern_history_spectrum_book_price.pdfIn PDF document text
    • http://kopalomara.iblogger.org/43513631937.pdfIn PDF document text
    • https://cdn.sqhk.co/giwitosak/vMP7hhN/slide_away_miley_cyrus_lyric_video.pdfIn PDF document text
    • http://spain50off.info/tofuxivesaxiz8b166.pdfIn PDF document text
    • http://sevowina.medianewsonline.com/how_to_prepare_for_an_office_administrator_interview.pdfIn PDF document text
    • http://all-casino.xyz/positive_affirmations_worksheete8m4s.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/jeduzizonox/excel_vba_if_sheet_name_exists_delete.pdfIn PDF document text
    • http://serekosesera.rf.gd/77419817416.pdfIn PDF document text
    • http://mowesedapi.epizy.com/3ds_emulator_for_pc_with_bios.pdfIn PDF document text
    • http://befadiw.rf.gd/35634652994.pdfIn PDF document text
    • http://zuwewabarabin.epizy.com/95559264348.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/accuri_c6_flow_cytometer_software.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/lodilujo.pdfIn PDF document text
    • http://zevazunepig.rf.gd/barcode_reader_android_github.pdfIn PDF document text
    • http://bodegifu.atwebpages.com/how_to_replace_heating_element_in_ge_spectra_oven.pdfIn PDF document text
    • http://perexuwofogefo.onlinewebshop.net/do_golf_cart_chargers_have_fuses.pdfIn PDF document text
    • http://witoluteg.epizy.com/79846738945.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_off0000fa3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3A 5284 bytes
SHA-256: f0a36273316079669c6316b3a25b1fd013faba88cf309a2224e42da0709992fa
font_01_sfnt_off00010c29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C29 10868 bytes
SHA-256: efb1fec3e566982f8908a076ff70d71e763ad2cc73cb977adbcb986c2d3d0596

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