Malicious PDF — malware analysis report

Static analysis result for SHA-256 634560048ee44b02…

MALICIOUS

PDF

76.7 KB Created: 2021-05-15 04:45:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 81e0461779bd635c38c9190be3a875a1 SHA-1: 249306a6838f9c99ec740276df2df1f195735b9e SHA-256: 634560048ee44b023498181bed890bf021186f6802e04052eed80b2bcb52e30b
126 Risk Score

Malware Insights

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

The PDF file contains a URL that redirects to a malicious domain, identified by heuristics as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/strik?utm_term=englander+wood+stove+prices PDF link annotation
    • https://cdn.sqhk.co/tumowara/cphhueU/snow_bros_part_2_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/bimonabozo/sqZMheT/98369370407.pdfIn PDF document text
    • http://ronifibofizet.medianewsonline.com/divopasub.pdfIn PDF document text
    • http://nageramuvepom.mywebcommunity.org/gepakugozi.pdfIn PDF document text
    • http://vakiduweg.mygamesonline.org/libros_para_aprender_frances_a1.pdfIn PDF document text
    • https://cdn.sqhk.co/vavewiminiv/kgfP4gd/spectacular_meaning_in_bengali.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://443275ec-395d-4f86-84c9-2ed7a250e117.filesusr.com/ugd/7d471d_c81349ff09b442cf99bdc29ebbe9cd36.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/john_deere_x320_owners_manual.pdfIn PDF document text
    • http://luvepel.myartsonline.com/besigheidsplan_voorbeeld.pdfIn PDF document text
    • http://roporuti.onlinewebshop.net/utilitech_three_outlet_outdoor_timer_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/how_do_you_solve_literal_equations_and_formulas.pdfIn PDF document text
    • https://d0a6b1b1-1773-4622-8b5e-0ab5990a7ed3.filesusr.com/ugd/b90ba1_bfc8d7ffdfbf4da1ba3173b9b6061486.pdf?index=trueIn PDF document text
    • https://a765b249-d442-4b07-8ea9-8318d996b894.filesusr.com/ugd/902d29_6b6ff82c131b46b78a524c11fb075aaf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/409e90fc-a822-4893-a86d-eb4cde4d6694/verifone_mx915_touch_screen_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/dikomavomem/magnesium_hydroxide_davis_drug_guide.pdfIn PDF document text
    • https://98748e4b-3258-471a-903e-8ea98415cca0.filesusr.com/ugd/fd7405_4e54214356f94e968bd17e69d3063104.pdf?index=trueIn PDF document text
    • https://51f47fa2-20f7-4ec4-bb91-8ae4aee689b4.filesusr.com/ugd/917232_ebf3819fd33d4837a303e55443912e03.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/report_bugs_hypixel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ad1b3cc-e065-4614-a068-f0d0741ed3cb/64874665437.pdfIn PDF document text
    • https://206c1dc7-391c-4b20-ac64-b63c97020fd4.filesusr.com/ugd/87773f_bf73b0248fbb41be9de224dbb956b936.pdf?index=trueIn PDF document text
    • https://71fc3d66-43b2-4ae0-adc3-dfbcdf8b5360.filesusr.com/ugd/6605a0_c97f42b6c99843c383633b7c24258360.pdf?index=trueIn 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_off0000ecd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD9 5352 bytes
SHA-256: 4d6d2cbdcab35522cfe2af3255506849f131aa57d59ab91979b73e2036e3aa50
font_01_sfnt_off0000ff38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF38 11612 bytes
SHA-256: f9e0a6e137213cc95e12f610a8a85aece9366eaffe774cce6247df8dfe598ebc

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