Malicious PDF — malware analysis report

Static analysis result for SHA-256 62871f9e57f346b2…

MALICIOUS

PDF

75.8 KB Created: 2021-03-02 09:40:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fdffbe95250f51b0ba1cbd350dad4d76 SHA-1: 02e8068de590c5e6066373420e5e6f4fff99ffd5 SHA-256: 62871f9e57f346b26595458fa60c682d6f4086277cfb3b956f285a29186fcaa9
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a primary suspicious URL identified as 'https://mezovuduw.ru/wix?keyword=hell%2527s+vengeance+book+2+pdf'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. The document body, though heavily obfuscated, contains text that appears to be a search query, reinforcing the lure. No scripts were extracted, but the PDF structure itself is used to host malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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/wix?keyword=hell%2527s+vengeance+book+2+pdf
    • http://voiprormul.xyz/screenshot_android_galaxy_91xuzp.pdf
    • http://nukapag.getenjoyment.net/xarimewogileg.pdf
    • http://goodsun.space/diferunesuzidarepzqwjb.pdf
    • http://heliusdesign.ru/wopidimuxuxilivuwazeliu7g5s.pdf
    • http://ladyso.ru/la_biblia_en_audio_reina_valera_1960_proverbioskbk4p.pdf
    • http://mixed-rootwork.com/petsmart_promo_codes19qod.pdf
    • http://beautysss.site/jenawabanelibiwapubavurphp2.pdf
    • http://idealslim-italiaofficial.site/vegan_milk_machine_manual6i1vo.pdf
    • http://jiteruruw.sportsontheweb.net/craftsman_17.5_hp_riding_mower_manual.pdf
    • http://politach.com/sudofiwigedidogezepkghrd.pdf
    • http://manamuposa.getenjoyment.net/juegos_del_hambre_pelicula_completa_espaol_latino_gratis.pdf
    • http://pelistens.xyz/pefufavenijikoxipowovinl1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://bebovufuvuji.myartsonline.com/narefumanowi.pdf
    • http://xinapigakumise.epizy.com/89658763079.pdf
    • http://wunikuwikefa.epizy.com/versiculos_dela_biblia_sobre_el_poder_de_la_oracion.pdf
    • https://s3.amazonaws.com/vitelitubovuluj/microsoft_word_format_loan_agreement_form.pdf
    • https://s3.amazonaws.com/muvarelo/adiponectina_funciones.pdf
    • https://s3.amazonaws.com/pesetufavo/lotus_notes_for_windows_10.pdf
    • http://wunekoxewufomaf.epizy.com/tickets_colbert_report_nyc.pdf
    • https://s3.amazonaws.com/musokejixami/19167555020.pdf
    • http://legopabez.rf.gd/jingle_bells_piano_sheet_music_free_easy.pdf
    • http://simusofitiralod.epizy.com/79733166718.pdf
    • http://nerelikeg.epizy.com/88985104108.pdf
    • https://s3.amazonaws.com/nemafu/fiddle_leaf_fig_tree_care_sheet.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d92e.bin
e42aa43a6ae0d35c4ceca7c6d38e2f806fcca3aade6c8bb9b95b8de8356886e4
pdf-font-stream PDF embedded font (sfnt) at offset 0xD92E 5276 bytes
font_01_sfnt_off0000eb30.bin
006bba5789c1c8cdf70a05600c2769ac94cf14d8c2e8ac5c430f80e6d43b989e
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB30 12644 bytes
font_02_sfnt_off000113cb.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x113CB 4324 bytes