Malicious PDF — malware analysis report

Static analysis result for SHA-256 76d0665501d2300b…

MALICIOUS

PDF

75.5 KB Created: 2021-03-07 12:44:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: d3a3e2ac2ce2f64f0b2ebcb69419274e SHA-1: f47bb6d2fac1e9c344b776d827d546bc81c15468 SHA-256: 76d0665501d2300b17bd7b3affd08d24e3a19fdc7c7acaabb1d310095fab726f
184 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical alert for linking to known malicious redirector infrastructure. The document contains a large number of embedded URLs, many of which point to disposable hosting and appear to be part of a link farm. The presence of these links suggests the primary purpose is to redirect users to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://crophysi.ru/strik?utm_term=star+trek+discovery+season+3+cast+trill In PDF document text
    • http://good-production20.site/lasedolizipobi36lkz.pdfIn PDF document text
    • https://nefakemibozike.weebly.com/uploads/1/3/5/3/135314079/gowin-jobovoxabunof.pdfIn PDF document text
    • http://shopwithsale.website/hedwig_s_theme_violin_sheet_music_easyt2d61.pdfIn PDF document text
    • https://zixikaro.weebly.com/uploads/1/3/5/3/135301636/lanik_kodegogema.pdfIn PDF document text
    • https://cdn.sqhk.co/lekusovu/fhchjia/96304034583.pdfIn PDF document text
    • https://gimuloge.weebly.com/uploads/1/3/0/7/130775506/ce3666022afaa.pdfIn PDF document text
    • http://vash-fasad.live/semi-_block_format_letterq8btl.pdfIn PDF document text
    • https://wufunuxiropid.weebly.com/uploads/1/3/2/7/132712508/b7c0860dbbc898.pdfIn PDF document text
    • http://lnstagramverifiedbadgeshelpcenters.net/yard_machine_lawn_mower_repairpach8.pdfIn PDF document text
    • http://gudokav.sportsontheweb.net/how_to_tell_if_refrigerator_compressor_is_bad.pdfIn PDF document text
    • https://jixejuterekafiw.weebly.com/uploads/1/3/4/5/134508928/fb92b7.pdfIn PDF document text
    • http://remontnatali.ru/meridiani_mondadoriets7c.pdfIn PDF document text
    • https://cdn.sqhk.co/nukasiwesex/ihjeidt/99338165300.pdfIn PDF document text
    • http://tersq.space/pelaziposivamaninomowb3k2.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/29e486e4-cf56-484d-85be-85f36948afc5/are_fba_courses_worth_it.pdfIn PDF document text
    • http://bamonoxo.onlinewebshop.net/we_the_animals_justin_torres.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89368fca-1eff-459f-970b-adf01e60a9a0/89736398093.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13c42419-57f7-4402-adf2-0ae9d7309f50/diary_of_a_wimpy_kid_i_need_you_now.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_off0000e979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE979 5428 bytes
SHA-256: f18c931c3e474f5445e791e490588a095ff843619e0e2be3117f05d0129d7448
font_01_sfnt_off0000fc09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC09 10848 bytes
SHA-256: 5dfd2c1eb05b5aa45fc548a51d8f7191795e30c0bb4d86e27e2d62dbc9875c8f

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