Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4adc6e54bfa8513…

MALICIOUS

PDF

79.1 KB Created: 2021-03-02 23:03:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5ce1d93b83a8c53801cec75f4b8232f8 SHA-1: 0d268481bac5a10693dcb308d5f6a6f912a041cd SHA-256: e4adc6e54bfa8513660f18ffe36f32d74aef44228ef2bf82d08e1dfffa3221a8
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains keywords related to survival food lists, indicating a lure to entice users to click on the malicious links.

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://leonvi.ru/strik?utm_term=survival+food+list+australia PDF link annotation
    • https://cdn.sqhk.co/raxoxawupej/hexjbhh/97935881707.pdfIn PDF document text
    • https://cdn.sqhk.co/wotutovebo/ijAPH76/75176356566.pdfIn PDF document text
    • https://cdn.sqhk.co/furigelo/m3Cgjhq/nostalgia_critic_meme.pdfIn PDF document text
    • https://cdn.sqhk.co/kibutonap/DFij0Ae/fakagevofivasakoje.pdfIn PDF document text
    • https://cdn.sqhk.co/jigitovewuk/ExKTzgc/ton_t_binh_phap_va_36_k.pdfIn PDF document text
    • https://cdn.sqhk.co/giganopof/cUjbSnx/677_pokemon_number.pdfIn PDF document text
    • https://cdn.sqhk.co/kejaxedusuk/c2cifhd/starry_sky_go_launcher_themes_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474722/normal_5ff80332e4508.pdfIn PDF document text
    • https://cdn.sqhk.co/jesupasuzoku/OvmFmjd/nurini.pdfIn PDF document text
    • http://probkin34.xyz/mirobubezakawojuvomoke99rvz.pdfIn PDF document text
    • http://gakmancreatures.ru/volawopupewalide7jcbn.pdfIn PDF document text
    • http://crispyset.online/richmond_tankless_water_heater_error_codesjqrrm.pdfIn PDF document text
    • http://kejamezegujoz.iblogger.org/sanajit_mondal_hit_baul_song.pdfIn PDF document text
    • https://cdn.sqhk.co/marezotije/j65icjf/54428118999.pdfIn PDF document text
    • https://cdn.sqhk.co/wirowanorax/aoIicHv/jojenoxopipovitid.pdfIn PDF document text
    • https://cdn.sqhk.co/pajokiman/jcvwsUf/71616895492.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jujewejono.epizy.com/gcse_circuit_questions_and_answers.pdfIn PDF document text
    • http://vobununebufipu.rf.gd/72804849430.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_off0000faad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAD 5064 bytes
SHA-256: 3694fb9a9f48010e0ae35d7c72746024abdadc02b8c77e0658301944e40753ef
font_01_sfnt_off00010bf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF8 10408 bytes
SHA-256: 0930bc1d75da2fa219ede214f593b2f2fbb1822d43715ed300a6e53890f419f8

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