Malicious PDF — malware analysis report

Static analysis result for SHA-256 4722207f1d4387e2…

MALICIOUS

PDF

80.9 KB Created: 2021-03-03 10:57:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 7253aa9e99ba724e30ff9366ca5a080f SHA-1: ba6040b5b95e09f74f3f12bea06cad520edf670d SHA-256: 4722207f1d4387e27fbb66469791c88a26e9f637be7c193c57ee585223139f33
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are structured as download links for applications or documents. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high volume of links on potentially malicious hosting, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/123?utm_term=alternative+f%25C3%25BCr+k9+mail PDF link annotation
    • http://jakartapro.xyz/hunter_assassin_apk_download_uptodowno6i8d.pdfIn PDF document text
    • https://cdn.sqhk.co/zalivelo/Tijifjj/ramboat_offline_shooting_action_game_download.pdfIn PDF document text
    • http://wellwork.site/retirement_savings_goals_by_age_403nmzr.pdfIn PDF document text
    • http://pigigozoruda.mypressonline.com/rt_ac68u_default_password.pdfIn PDF document text
    • http://fukuzowi.sportsontheweb.net/vimowudizixatuvusitekama.pdfIn PDF document text
    • https://cdn.sqhk.co/gusiloxi/qifcjJX/xejelejojowigepusi.pdfIn PDF document text
    • http://luchdobro.site/expanded_form_to_standard_form_worksheetsuglgc.pdfIn PDF document text
    • http://detonic-buy.website/nc_pug_rescuepeszh.pdfIn PDF document text
    • http://carins.info/authentic_happiness_audiobookh4ke2.pdfIn PDF document text
    • https://rogejizerabori.weebly.com/uploads/1/3/4/7/134763318/1857766.pdfIn PDF document text
    • https://lidovoji.weebly.com/uploads/1/3/4/3/134313359/87d222fee859603.pdfIn PDF document text
    • http://wofonefa.iblogger.org/11390563720.pdfIn PDF document text
    • http://ruluzuzadol.mypressonline.com/51690725494.pdfIn PDF document text
    • https://cdn.sqhk.co/gadewekunel/ieujdLb/31278480917.pdfIn PDF document text
    • https://duxezixupedad.weebly.com/uploads/1/3/4/0/134095883/e0d44fa3de51bc.pdfIn PDF document text
    • https://nasoluludeg.weebly.com/uploads/1/3/4/4/134435301/xuwerivewavu_kimidubajozu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://satawakerexe.atwebpages.com/zumome.pdfIn PDF document text
    • http://xilibosukotijob.epizy.com/10298489063.pdfIn PDF document text
    • http://zarevarepi.epizy.com/purudekijufivel.pdfIn PDF document text
    • http://supuwevul.atwebpages.com/jazak.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF028 5124 bytes
SHA-256: 50eef42cddf8ef3c53bf0456038f9f8f4227c57e3df7a34dba8878c1470e974a
font_01_sfnt_off0001014f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1014F 4684 bytes
SHA-256: 43bdf7e079261c304fa904c78015c0313f4bcdae5a73ee4b31cf1e6699b54e7c
font_02_sfnt_off00010e22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E22 11592 bytes
SHA-256: d2fe292e56186ed7f78b7312baf90ba27e7c995fa22abf958e0d3a50eaf5996f

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