Malicious PDF — malware analysis report

Static analysis result for SHA-256 c302b2501acab810…

MALICIOUS

PDF

70.7 KB Created: 2021-02-27 10:41:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 0e0fd61b6355d5b49cdea513353188ed SHA-1: 6d06adf213ba13fe555e4b692032d5d81c577d3c SHA-256: c302b2501acab810629dccf93ad5b97c0f3c67621e6a0e9ad162f8790f444046
184 Risk Score

Malware Insights

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

The sample is a PDF file identified as malicious by multiple heuristics and an ML classifier. It contains numerous embedded URLs, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'Wolf range cost uk'. The presence of multiple links on disposable hosting and the redirection to known malicious infrastructure indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/123?utm_term=wolf+range+cost+uk In PDF document text
    • http://academic-club.ru/best_caption_and_status_2020pgd52.pdfIn PDF document text
    • http://fuvesozufinefi.medianewsonline.com/62644825291.pdfIn PDF document text
    • http://pigigozoruda.mypressonline.com/zisomobafukale.pdfIn PDF document text
    • http://povulofi.mywebcommunity.org/fukimobajoru.pdfIn PDF document text
    • http://ridovise.sportsontheweb.net/10_ejemplos_de_dispositivos_de_proceso.pdfIn PDF document text
    • http://bagerisevi.scienceontheweb.net/zavuwezizufevobolimesi.pdfIn PDF document text
    • http://tipofeliluget.medianewsonline.com/wejidegepepatebitofit.pdfIn PDF document text
    • http://pubgucbayim.com/how_to_change_wifi_password_linksys_router_e12001ac06.pdfIn PDF document text
    • http://pixunune.sportsontheweb.net/nofusow.pdfIn PDF document text
    • http://subuxiwubemew.getenjoyment.net/how_many_books_are_in_the_selection_series_in_order.pdfIn PDF document text
    • http://good-production17.site/nozuvijonagozeniniba9xupu.pdfIn PDF document text
    • http://majikok.mygamesonline.org/tosezapusafaxi.pdfIn PDF document text
    • http://lozejebivo.scienceontheweb.net/likazizabuwenuwedetapi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://memapekoge.epizy.com/sexirutopavefiw.pdfIn PDF document text
    • http://zefifimagami.epizy.com/gepikelolurijodo.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_off0000d7e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E5 5128 bytes
SHA-256: 4b7c2754ee3f9aa5f88f2dfe090643cb060e5620048161aac32d6d85c9fa896b
font_01_sfnt_off0000e97c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE97C 10864 bytes
SHA-256: 696c3b2cb58f7fd93f64e4a63c1c844638546d29dfc42ec31d72e847054202de

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