Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5e52ce22d3eb8c0…

MALICIOUS

PDF

75.2 KB Created: 2021-03-24 14:27:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 62102beb571c0989c40c012c42819e04 SHA-1: 997ffc197358bad3e91fa917a4b92e49e15225d6 SHA-256: b5e52ce22d3eb8c0df5548ef55ba03d2c0c15d3f513ec444c9a396d98a35e505
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or redirection scheme. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM specifically identifies the sample as a link farm on disposable hosting, reinforcing the phishing or redirection attack pattern. While no scripts were explicitly extracted, the presence of numerous external URIs and the nature of the heuristics strongly suggest the document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/award?keyword=botanical+names+of+plants+and+animals+pdf PDF link annotation
    • https://sulekigotama.weebly.com/uploads/1/3/4/3/134307446/xipepilusutari.pdfIn PDF document text
    • http://copyrightreports.com/kixewedovec2e3l.pdfIn PDF document text
    • http://timinome.getenjoyment.net/10th_new_syllabus_sura_guide_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/qCyRcJP/fdic_call_report_glossary.pdfIn PDF document text
    • https://cdn.sqhk.co/wazilisiko/Pciigf3/frontline_commando_d_day_hack_mod_download.pdfIn PDF document text
    • https://cdn.sqhk.co/favejofu/hcieidn/mobixed.pdfIn PDF document text
    • https://refapezi.weebly.com/uploads/1/3/4/9/134904673/3844858.pdfIn PDF document text
    • http://zavodtriumf.com/200969641keyie.pdfIn PDF document text
    • http://leqqurint.online/905920038482mr0x.pdfIn PDF document text
    • https://favonewe.weebly.com/uploads/1/3/2/6/132695639/rekar.pdfIn PDF document text
    • https://naferukogewoza.weebly.com/uploads/1/3/1/4/131406713/bitatovemuvivum.pdfIn PDF document text
    • https://cdn.sqhk.co/popenewosaso/pxoE5jj/givajabu.pdfIn PDF document text
    • https://cdn.sqhk.co/dasadogiso/EEKFrji/jawaleniwa.pdfIn PDF document text
    • http://afracheat1.xyz/tablas_de_verdad_ejercicios_resueltos69924.pdfIn PDF document text
    • http://bevamifugidujew.scienceontheweb.net/public_health_nutrition_textbook.pdfIn PDF document text
    • https://cdn.sqhk.co/rilowikapaz/cgehf3r/equalizer_bass_booster_pro_coocent_apk.pdfIn PDF document text
    • http://lnstagram-verificationbadgeform.com/filigedajezijinat3ghm0.pdfIn PDF document text
    • http://just-gopro.com/como_crear_un_archivo_zipp6wak.pdfIn PDF document text
    • https://vipegiwofavagob.weebly.com/uploads/1/3/5/3/135302795/b24d249f67e019.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gixopiv.onlinewebshop.net/benefits_of_fasting_and_prayer.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_off0000e8a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A0 5256 bytes
SHA-256: 0bbbbece53d1b4e8d941857ca4b0fc03013315ad2228be7f56cf688e5cc79592
font_01_sfnt_off0000fa74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA74 11060 bytes
SHA-256: e0fb51689b3bb72000748d9176a5b412f4687902b588d58d6575fb2c1871e313

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