Malicious PDF — malware analysis report

Static analysis result for SHA-256 e76db4548815b659…

MALICIOUS

PDF

73.1 KB Created: 2021-03-17 15:56:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d326dd1fa52a28f0d4ca1e28e0ac194f SHA-1: b224cbb89958f32ca7ac883509123defb06daa90 SHA-256: e76db4548815b659b9f1107b89fb4b01016a102a87ad796eea4232c3cad8300f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with at least two pointing to suspicious domains ('soxebez.ru' and 'reduslim-italiaufficiale.site') that are likely part of a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, suggests a lure related to 'yoga poses for weight loss belly'.

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://soxebez.ru/strik?utm_term=yoga+poses+for+weight+loss+belly PDF link annotation
    • http://reduslim-italiaufficiale.site/wow_classic_paladin_healing_leveling_guide6581l.pdfIn PDF document text
    • http://eurofamily.pro/luvul926vo.pdfIn PDF document text
    • https://romuxejis.weebly.com/uploads/1/3/4/8/134887308/dowimenafo.pdfIn PDF document text
    • https://vutameko.weebly.com/uploads/1/3/4/5/134576445/5661633.pdfIn PDF document text
    • http://theandyhong.com/votosusiramonegidqapg.pdfIn PDF document text
    • http://salonop.xyz/verizon_fios_router_dns_settings6c50c.pdfIn PDF document text
    • http://xekalabaxuv.medianewsonline.com/karumuxedupej.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/vavejijitatofu/mamozukilexidasopegerisa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffc7edc0-51da-41d0-8a42-5bbc6aa2994c/82978501005.pdfIn PDF document text
    • http://tupesom.atwebpages.com/wofeligewiwigixanugajig.pdfIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/greek_word_for_sea_monster.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9239215-8eb0-4c13-9852-31ef38747945/21289368963.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/654479b3-290c-4bae-a62e-a853198af5b1/32954155181.pdfIn PDF document text
    • https://e25b5f36-ee09-4010-8803-019b2853a23b.filesusr.com/ugd/c34eac_781eb06ca2cd485bb79dee2d0fbc3f47.pdf?index=trueIn PDF document text
    • http://sisufovofow.atwebpages.com/92056224556.pdfIn PDF document text
    • http://vawanumezal.onlinewebshop.net/56862726444.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/cast_sql_date_format.pdfIn PDF document text
    • https://c06d174a-caca-4ab2-b5a0-4525cd3135d4.filesusr.com/ugd/856cea_6432ba4bf25a412c80d2026d77e5077d.pdf?index=trueIn PDF document text
    • https://e2604e0b-f95a-4acb-b53f-a7db3827b2a1.filesusr.com/ugd/225520_6dd5caf519274127ae4aea4d02d70f3c.pdf?index=trueIn 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_off0000e088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE088 5456 bytes
SHA-256: 3c36ac7a0a2baacfaca95d2458f9d268efb4ddd5bcdcfa6caefb34294f731a0c
font_01_sfnt_off0000f32d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF32D 10524 bytes
SHA-256: acdfd547b35b1d5e864b94baf5e1ecddfef34abb744301b0b2fe96bcae9ff272

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