Malicious PDF — malware analysis report

Static analysis result for SHA-256 f66ed46633b130fb…

MALICIOUS

PDF

74.1 KB Created: 2021-03-02 19:09:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e022ebb249f27aa58fbd15882ebd81b5 SHA-1: df16fea7ea73a5744b5160687d81f0c1688f767b SHA-256: f66ed46633b130fb1d7b07cc80f226d34f5bf9c85edf001bab595d2311270f1a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains multiple embedded URLs, with a primary focus on directing users to 'xajibur.ru'. This URL is presented in a context that mimics search results for 'spotify most played songs 2019', indicating a phishing or social engineering lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

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://xajibur.ru/strik?utm_term=spotify+most+played+songs+2019 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4410731/normal_5fd71144d0880.pdfIn PDF document text
    • http://kfcrabota.ru/how_to_enter_bios_setup_in_hp_pavilion_laptopnsyoa.pdfIn PDF document text
    • http://tells.fun/80265244400zyyww.pdfIn PDF document text
    • https://cdn.sqhk.co/gobuwovuv/aYggIhf/47131615588.pdfIn PDF document text
    • http://fafijitesulexiz.mygamesonline.org/snake_air_force_1_custom_sneaker_shoes.pdfIn PDF document text
    • http://freefire-gifts.com/warajufubepefawakotawirua1grz.pdfIn PDF document text
    • http://vowujebotoza.mywebcommunity.org/21139297995.pdfIn PDF document text
    • http://basvuruizleme.online/637732202141l6rg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426697/normal_5fdbc0492f815.pdfIn PDF document text
    • http://com-connexion.xyz/from_dictatorship_to_democracyw0j7j.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wurivuve/fetawinoxuwapiri.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/43876113423.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/25501053516.pdfIn PDF document text
    • https://s3.amazonaws.com/wowonesoribu/wotawukeje.pdfIn PDF document text
    • http://pudolajuji.atwebpages.com/tokunbo_toyota_corolla_2016_price_in_nigeria.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/can_you_play_witcher_2_on_xbox_one.pdfIn PDF document text
    • http://mukanebesiva.atwebpages.com/why_does_my_skin_burn_but_no_rash.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_off0000e0c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C0 5952 bytes
SHA-256: 59d5a5308d1ac4430d3733c915376af38aaa5b18fb7af117b8438951cc362d58
font_01_sfnt_off0000f500.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF500 11232 bytes
SHA-256: de7f36fbe452bd9ed26ce6784e5cc88dd926806845a891dfecc6ff63a9948c2e

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