Malicious PDF — malware analysis report

Static analysis result for SHA-256 a030324e82c45181…

MALICIOUS

PDF

79.4 KB Created: 2021-02-19 08:13:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: da7847b8775318670be30ae858a06207 SHA-1: 2c25cb9bccfe0cbcc23f91c06ab636e63edaa0a9 SHA-256: a030324e82c45181c34664e8e05a05d51cb71678af6780aec833ba45e0bea060
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. The document body, though heavily obfuscated, contains text related to 'Harry Potter books' and 'wkhtmltopdf', suggesting a lure to disguise the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/strik?utm_term=harry+potter+books+illustrated+pop+up PDF link annotation
    • http://siteznakomstv69.space/mufulerepiximigxpvbf.pdfIn PDF document text
    • http://makeyourself.xyz/bittorrent_filehippo_freekk7cf.pdfIn PDF document text
    • http://toolsbestpricemicrometer.site/search_instagram_account_by_email0gio1.pdfIn PDF document text
    • http://gatorama.site/mexixevopunisnkp3l.pdfIn PDF document text
    • https://cdn.sqhk.co/tusadopovet/ij7Vzha/lepof.pdfIn PDF document text
    • https://cdn.sqhk.co/figegixo/jeGjj0N/let_s_survive_survival_in_zombie_apocalypse_gameplay.pdfIn PDF document text
    • http://mexicotop3.xyz/ver_online_el_amor_en_tiempos_de_colera_pelicula_completa_en_castellanop2041.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475720/normal_5fc96d674c274.pdfIn PDF document text
    • https://cdn.sqhk.co/najiligopej/eEFA18k/nufizi.pdfIn PDF document text
    • https://cdn.sqhk.co/wejagamewo/3Iljje6/sevezame.pdfIn PDF document text
    • http://creditscorecard.info/5382598489903q3j.pdfIn PDF document text
    • http://bathforlegs.xyz/slack_chambers_administrao_da_produouywds.pdfIn PDF document text
    • http://regse.website/subhash_kashyap_our_constitution_download8vmyb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://divepirat.epizy.com/scholastic_story_map.pdfIn PDF document text
    • http://vulaxojanomu.rf.gd/agya_koo_nimo_songs.pdfIn PDF document text
    • http://kakoxiji.rf.gd/81871448600.pdfIn PDF document text
    • http://pubilovojut.epizy.com/ultrasonic_ranging_module_hc_sr04_datasheet.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBF 5220 bytes
SHA-256: 4302bdf83e4e14390ddd7e8d82eaf6d3686a5b0f39de36cb21787a137338736a
font_01_sfnt_off00010d88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D88 10624 bytes
SHA-256: 1e207c5212ef350c92aa1da7cc240ba05562fb928b11c41c90e82f59a7b31e14

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