Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa09bd24e69cfa15…

MALICIOUS

PDF

76.0 KB Created: 2021-03-04 10:46:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d7699222e82ac1bb44d988bb55723de3 SHA-1: 61eb902b2d4f2a470012f4959f0684032e870ead SHA-256: aa09bd24e69cfa159e3ff6d995c012ea960b8558c8e00bfdac492b6e45baf435
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, contains keywords related to a product manual, likely a lure to direct users to the malicious URLs.

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://xezojetit.ru/wix?keyword=new+nintendo+3ds+xl+manual PDF link annotation
    • http://setokanekema.mygamesonline.org/fewobagotadez.pdfIn PDF document text
    • http://vataponuxizeliz.mywebcommunity.org/how_to_day_trade_options_on_robinhood.pdfIn PDF document text
    • http://nesebonuvobeju.getenjoyment.net/30201970153.pdfIn PDF document text
    • http://zinusefubowewet.22web.org/birezivob.pdfIn PDF document text
    • http://peluxuba.sportsontheweb.net/you_always_interrupt_me_quizlet.pdfIn PDF document text
    • http://wejuzofibab.medianewsonline.com/dizenalixis.pdfIn PDF document text
    • http://pojorabe.iblogger.org/naats_new_2018_audio_free.pdfIn PDF document text
    • http://baxusajatos.sportsontheweb.net/salvation_langston_hughes_audio.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://foripoj.epizy.com/maridadasisifen.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/bedingte_formatierung_excel_wenn_x_dann_farbe.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/bacterial_transformation_definition_biology.pdfIn PDF document text
    • http://rolubumemetujin.atwebpages.com/winters_bone_parental_review.pdfIn PDF document text
    • http://vewomani.rf.gd/a_cuantas_tazas_equivalen_150_gramos_de_azucar.pdfIn PDF document text
    • http://tuzuxutetug.atwebpages.com/85274421472.pdfIn PDF document text
    • http://zikoliduxa.atwebpages.com/jusowisogiturukavusoku.pdfIn PDF document text
    • http://zinapur.epizy.com/pazol.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/find_local_travel_guides.pdfIn PDF document text
    • http://venakato.epizy.com/64968754588.pdfIn PDF document text
    • http://kutukisorato.rf.gd/star_trek_discovery_cast_season_1_admiral.pdfIn PDF document text
    • http://fepoxojosatomu.epizy.com/abdomen_agudo_elsevier.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE061 5048 bytes
SHA-256: 2173cef343cd66349479dc970e4fffe8b3fb500aae173ceaf45deeab7f43a74f
font_01_sfnt_off0000f192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF192 10184 bytes
SHA-256: 113616aff7875e827a057bc7e2c14f2c8e9ef8c2639cbccda93550b2f15fcad6
font_02_sfnt_off00011488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11488 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361