Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a89f24d7df04b42…

MALICIOUS

PDF

70.0 KB Created: 2021-03-06 10:56:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 34ea9affaf0d807a2a81df178bf1e201 SHA-1: 051ea04948ff0fa45f319725f9f820963af8cf7f SHA-256: 2a89f24d7df04b421e2664a90165086edcc1711e5a494b66a839af293d6f08ac
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting a phishing or malware distribution campaign. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites.

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://jottigo.ru/strik?utm_term=stihl+ms170+carburetor+rebuild PDF link annotation
    • http://tanemazijafawin.medianewsonline.com/rusuzewew.pdfIn PDF document text
    • https://cdn.sqhk.co/jozojonujaj/cOHhjLN/wigotitafagebe.pdfIn PDF document text
    • https://cdn.sqhk.co/doginifa/ceiiFhj/kenakizuwopubas.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/gLggR6O/download_army_counter_terrorist_attack_mod_apk.pdfIn PDF document text
    • http://jibuveborufo.iblogger.org/vitamin_b12_structure.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafepel/zlvo7ij/anime_live_wallpaper_mod_apk_3._3.pdfIn PDF document text
    • https://cdn.sqhk.co/nobixapo/jhCc54V/ping_pong_master_hack_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/xawefigi/jab2LQM/60695056335.pdfIn PDF document text
    • http://mopexaxurip.getenjoyment.net/ligobomatifax.pdfIn PDF document text
    • https://cdn.sqhk.co/bivuwusim/zo0ijge/phoenix_craigslist_farm_and_garden.pdfIn PDF document text
    • http://nusowutevu.getenjoyment.net/xazofulujiwupag.pdfIn PDF document text
    • http://nizuvifoko.iblogger.org/davupugukovujujujorixu.pdfIn PDF document text
    • http://finuxezanasa.mygamesonline.org/tuwogarisebaje.pdfIn PDF document text
    • https://cdn.sqhk.co/tizudukokeni/lJshajc/basketball_arcade_machine_for_rent_philippines.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sifepilojiba.rf.gd/hidden_pictures_color.pdfIn PDF document text
    • http://weparaxopulo.atwebpages.com/pelemabukuxazu.pdfIn PDF document text
    • http://zudosikewemer.epizy.com/42123131935.pdfIn PDF document text
    • http://simanij.rf.gd/89680471049.pdfIn PDF document text
    • http://wififeju.atwebpages.com/baby_girl_names_that_start_with_zi.pdfIn PDF document text
    • http://lojarine.epizy.com/a_type_of_spreadsheet_software.pdfIn PDF document text
    • http://xaxidos.epizy.com/zegufepofimanabej.pdfIn PDF document text
    • http://ziputira.epizy.com/wowomalesorilowedoka.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_off0000d23b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD23B 5696 bytes
SHA-256: 4880830932404264430b6341d1cf0722e99a0c58e5b4e322aea64c75d8f550af
font_01_sfnt_off0000e573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE573 11016 bytes
SHA-256: da08a380a19af7628f2160b585f5900726bcfe5e10f3ea4ec73bdc43f43b2caf

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