Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4df40a27f7e17f5…

MALICIOUS

PDF

84.2 KB Created: 2021-03-27 20:14:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 32174d355fa76bc5f47c59f92600b74a SHA-1: 9a8286ed361ca9602986cf63aaf62fd8e49f2de3 SHA-256: e4df40a27f7e17f5c105316fab9b9f63b2b0ff9b0c6df78a3d628f5520a2500f
126 Risk Score

Malware Insights

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

The PDF file contains an embedded URL pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is part of a link farm on disposable hosting, further suggesting malicious intent. Although no scripts were extracted, the presence of external URIs and the ML classifier's high confidence score support a phishing or malware delivery attack pattern.

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://ponafet.ru/wix?keyword=10+errores+de+los+testigos+de+jehova PDF link annotation
    • http://servisvds.ru/latitijx6jpe.pdfIn PDF document text
    • http://zekojotewakugag.mypressonline.com/la_boite_a_merveille_chapitre_1_analyse.pdfIn PDF document text
    • http://kino-vezde.ru/82845441030714kd.pdfIn PDF document text
    • http://towufato.mywebcommunity.org/21729992566.pdfIn PDF document text
    • http://fuvisetitisenon.mypressonline.com/bitmap_to_converter_online_free.pdfIn PDF document text
    • http://antileqphh.site/how_to_size_a_transformer_for_landscape_lightingpafg5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/lupuvogotog/jowuganatebofatixolejeri.pdfIn PDF document text
    • https://332892e0-6a2b-40ad-946e-e7c92c61c867.filesusr.com/ugd/3e5d97_7403e101815a46d492285d67752555ca.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vunizi/ftse_all_world_ex_us_index_factsheet.pdfIn PDF document text
    • https://cb47f074-0476-4434-b381-5672a365cab8.filesusr.com/ugd/c46c8a_7cb029c82b524537b26d857270bbd876.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/lagu_stay_blackpink.pdfIn PDF document text
    • https://80f75f89-a1e3-4611-a0ef-7a704eb82da9.filesusr.com/ugd/0286dd_956fdcbeccbf42e5982c0c9d5e3f403c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/fender_frontman_212r_amp.pdfIn PDF document text
    • https://s3.amazonaws.com/suxuzubojut/42271725989.pdfIn PDF document text
    • http://ratobewiwigu.atwebpages.com/curso_aprendizajes_clave_preescolar.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/ditixakonozanopuxoriza.pdfIn PDF document text
    • http://xakazasaravi.onlinewebshop.net/gamowezurokobizijowow.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDEC 5004 bytes
SHA-256: b09d6a79bc1634776f88836e3be038400c6cc569c33bff01c05d467065012b16
font_01_sfnt_off00010f02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F02 11680 bytes
SHA-256: 0818ed91ff7ec75c40e2a9487e1cde2c06d45f4684d325829d2947f32ea9f29e
font_02_sfnt_off0001351f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1351F 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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