Malicious PDF — malware analysis report

Static analysis result for SHA-256 a13cca59416db789…

MALICIOUS

PDF

71.5 KB Created: 2021-04-06 01:07:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 2bec865d640e2cdc7a5c19e81f12b599 SHA-1: 27ac38639fe3ef960d7f590c5bb53335d7cec068 SHA-256: a13cca59416db789309323cd57e75692b52eaeb2fdfe70f7728dabd6c45153a8
126 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains an embedded URI pointing to a suspicious domain, suggesting it's used to redirect users to a phishing or malware distribution site. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this by indicating the PDF is part of a link farm on disposable hosting, a common tactic for phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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://dugedepap.ru/strik?utm_term=tin+tin+chinese+food+scranton+pa PDF link annotation
    • http://raxuvedibu.22web.org/mathematical_terms.pdfIn PDF document text
    • http://mitutepoka.medianewsonline.com/47586041528.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413473/normal_6001c54758df4.pdfIn PDF document text
    • http://kenufapozij.22web.org/90811855781.pdfIn PDF document text
    • http://bomaduworofa.medianewsonline.com/momuzukitefelo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416331/normal_6021be7cbe802.pdfIn PDF document text
    • http://ranopefutaranuj.iblogger.org/guwudibub.pdfIn PDF document text
    • http://pejokepi.mywebcommunity.org/16343156570.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365584/normal_5fce7aa198f93.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ab84126-7524-496f-b860-041136b8c899/metro_2034_gameplay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54c97f3b-5c9f-4d30-8b2a-c2b1b1020535/nutrition_care_specialist_jobs.pdfIn PDF document text
    • http://ginowane.onlinewebshop.net/56929900271.pdfIn PDF document text
    • http://dovanokeji.epizy.com/unix_shell_scripting_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6be8d30-9abf-49d2-96fb-8ae1db99dc41/head_first_java_free_download_book_latest_edition.pdfIn PDF document text
    • http://jemileti.atwebpages.com/butterball_turkey_air_fryer_cooking_times.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/702b8e70-7151-4e98-b1a4-78135216c052/conversation_casanova_book_download.pdfIn PDF document text
    • http://ludugatitabi.atwebpages.com/speak_now_3_free_download.pdfIn PDF document text
    • http://biwipekimati.rf.gd/luwewanaperen.pdfIn PDF document text
    • http://kipazafar.atwebpages.com/agenda_2020_italiano.pdfIn PDF document text
    • http://kugibujupedo.rf.gd/fikexuwizomorapu.pdfIn PDF document text
    • http://wugujub.onlinewebshop.net/articulo_4_dela_constitucion_mexicana_de_la_salud.pdfIn PDF document text
    • http://dovivinapex.epizy.com/61126739987.pdfIn PDF document text
    • http://xovimed.rf.gd/21952458490.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_off0000d7e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E7 5160 bytes
SHA-256: 5c872b4897f51a80e8d5ad5c883fb4b2bf1edc68aab0f7eb688c28e335bf1a76
font_01_sfnt_off0000e970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE970 11056 bytes
SHA-256: e5599881d74ab91a6c0a413daf692a9620cf985dbcf2e9341ad494ce6c47895b

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