Malicious PDF — malware analysis report

Static analysis result for SHA-256 bba722c0f459348f…

MALICIOUS

PDF

92.8 KB Created: 2021-02-23 16:20:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: f331c41d0ebaeb3d8cc74c020e0a2dd6 SHA-1: cfe3ca6bc020d95ec1e57ae8bc07c7b566b0a67a SHA-256: bba722c0f459348fc48a0dad4ca7d4af7d8b4c11ae937de726403697b81bb8d3
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs that redirect to malicious domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a common phishing lure, likely leveraging JavaScript for redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/strik?utm_term=american+standard+furnace+customer+reviews PDF link annotation
    • http://mynasert.online/23341191032ostwp.pdfIn PDF document text
    • http://tixshopclub.space/83170456782mcg5j.pdfIn PDF document text
    • https://cdn.sqhk.co/zabitokepum/4ihyjgm/pakunigugazogosi.pdfIn PDF document text
    • https://cdn.sqhk.co/simikitivo/dijhqRf/pidobixekujegone.pdfIn PDF document text
    • http://idealicaitalia.website/manual_fiat_siena_hlx_1.8_2005xdi83.pdfIn PDF document text
    • http://pumba.fun/22491303517d8m04.pdfIn PDF document text
    • https://cdn.sqhk.co/vegedusovo/hjg3to3/can_you_escape_100_room_2_level_5.pdfIn PDF document text
    • http://cocobuka3.xyz/statistical_reasoning_for_everyday_lifewl0ll.pdfIn PDF document text
    • https://cdn.sqhk.co/jivaduzar/ibMjejR/skater_boy_avril_lavigne_album.pdfIn PDF document text
    • https://cdn.sqhk.co/veletafi/bhcijaL/76629432411.pdfIn PDF document text
    • https://cdn.sqhk.co/mozigizax/i1hg4GG/loner_lyrics_yungblud.pdfIn PDF document text
    • https://cdn.sqhk.co/sebidurubuze/FggeaxK/3d_pen_craft_ideas.pdfIn PDF document text
    • http://2022god.com/53995703825kd7li.pdfIn PDF document text
    • https://cdn.sqhk.co/wanaxowuwot/4iiBgdY/weezer_buddy_holly_lyrics.pdfIn PDF document text
    • http://cleaner360.shop/162491784236zvp3.pdfIn PDF document text
    • https://cdn.sqhk.co/sedazozesufu/esiaCkA/47298465271.pdfIn PDF document text
    • https://cdn.sqhk.co/bakebuvig/r6mSjfx/mom_s_word_game_level_28.pdfIn PDF document text
    • http://proba7.xyz/los_generales_de_dios_2_gratise4a88.pdfIn PDF document text
    • https://cdn.sqhk.co/dopuzodopuvu/ikMukhe/folumibasikemivazo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00012f00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F00 5276 bytes
SHA-256: 26ef8b960902f4f9486c7439bc333dc7b70a77742428aa2df4300511be53b965
font_01_sfnt_off000140eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140EB 10764 bytes
SHA-256: 63f89b8d0b8bf72ebf878daf028482e9278d70700eecbdd209c040d6395dbe8f

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