Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a4e32616ba7c0db…

MALICIOUS

PDF

66.8 KB Created: 2021-04-15 13:05:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: c8e693240a6b4b2f30de6040eb281940 SHA-1: 604531b85d4d152b7cf2eed1e847171f432c14ca SHA-256: 6a4e32616ba7c0db5cf82de4eefeb82e0ce0712390937ed8a68718169e756556
126 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by heuristics as a link farm and flagged by ML and ClamAV as malicious. The document body, though heavily obfuscated, contains keywords related to printer issues, suggesting a lure. The presence of external URIs indicates an attempt to redirect the user to a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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://soxebez.ru/strik?utm_term=why+is+my+zebra+printer+not+printing PDF link annotation
    • http://fofikotopavabe.iblogger.org/fuel_cell_technology_market_report_2017.pdfIn PDF document text
    • http://rutevelafi.iblogger.org/67686295433.pdfIn PDF document text
    • http://zugasanuko.getenjoyment.net/kali_linux_revealed_book_download.pdfIn PDF document text
    • http://gepanukotex.getenjoyment.net/dalimiva.pdfIn PDF document text
    • http://gixokil.iblogger.org/regulaciones_de_la_aduana_de_cuba_2020.pdfIn PDF document text
    • http://pipavinekiga.mywebcommunity.org/28978529774.pdfIn PDF document text
    • http://xuxelenoxuze.iblogger.org/nefatix.pdfIn PDF document text
    • http://minesaxofunawi.getenjoyment.net/82469042967.pdfIn PDF document text
    • http://nugiperemepan.22web.org/kanawaselazulonegisep.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/xijuxosisomuna/printable_worksheets_for_long_division_with_remainders.pdfIn PDF document text
    • https://590703a0-be71-4d3c-a49f-17767d5969ef.filesusr.com/ugd/656c20_5c041a6e82684db09d1e48e67e1cbd59.pdf?index=trueIn PDF document text
    • https://11ca5eb4-0abe-4d5d-8073-3f36f6088e80.filesusr.com/ugd/8b62d8_c766d9ba86814bbc9d959fd8913df5d2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/as_i_lay_dying_william_faulkner_character_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f993df63-383d-4649-9e61-84982ca0452e/final_walkthrough_before_closing_on_new_construction.pdfIn PDF document text
    • http://livodubudo.rf.gd/anticoagulation_reversal.pdfIn PDF document text
    • http://puguvapalovuzub.rf.gd/webex_room_kit_datasheet.pdfIn PDF document text
    • http://rukosivujuxu.atwebpages.com/vivadoxupinutume.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c672fb1-69a6-42f1-9c4b-de550044deda/sasowozobujizemezezuw.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/95574246264.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31c3dc84-91e5-464c-a0ae-1e7f28ea40cc/how_do_i_find_stock_symbols.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab5cd5a5-7cfc-40b6-8450-a519cbaf3f39/tosazevowakeleba.pdfIn PDF document text
    • http://jemibare.epizy.com/zerevogumexigipox.pdfIn PDF document text
    • http://sonowodiguvab.epizy.com/aplicativo_netflix_para_ipad.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_off0000c974.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC974 5508 bytes
SHA-256: 4148973abf7081fd55f6feda451301ead2e0cfaaf15d094d4b9676f7e7bbe805
font_01_sfnt_off0000dc18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC18 9804 bytes
SHA-256: 7978ee9fabd67011a89d8440009e75bac5f4049157c53a7d5300cb609b22a703

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