Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bbafe7b26c09197…

MALICIOUS

PDF

66.1 KB Created: 2021-02-05 08:10:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0f8984b7aaa0068bc1ae8b87c3aba268 SHA-1: ec5ee73905843455a0b1ba619f8e72b681ef70e4 SHA-256: 0bbafe7b26c091976e75c4b3bdab383e0f8e9d220913d97cfd6f0ccde6fdfe0c
154 Risk Score

Malware Insights

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

The PDF contains a link disguised as a driver download, which is a common phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect the user to a malicious site or download further malware. No scripts were extracted, but the presence of a malicious redirector URL is a high-confidence indicator of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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/wb?keyword=acer%20drivers%20pack In PDF document text
    • http://businessoutsourcing.info/758574910912x8w4.pdfIn PDF document text
    • http://yozi.store/81075150430pdgbv.pdfIn PDF document text
    • http://frukt.space/digimon_next_order_field_guide1v1yx.pdfIn PDF document text
    • http://interstart.online/palabras_de_despedida_para_alumnos_de_sexto_grado_primaria1z8k6.pdfIn PDF document text
    • http://kamini33.ru/358804683573j3ic.pdfIn PDF document text
    • http://study-english-05.site/66104265140onei1.pdfIn PDF document text
    • http://akvatehnika74.ru/sopaxunowukn5gw.pdfIn PDF document text
    • http://top-agent.ru/hollow_core_plastic_sheets1euna.pdfIn PDF document text
    • http://dietnatur.fun/pava_electrica_atma_manual4wecz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/guided_word_meditation.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/sipububa.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/benevitobima.pdfIn PDF document text
    • http://jazupizewatabal.epizy.com/52751774988.pdfIn PDF document text
    • http://savexopuzasi.epizy.com/99810512897.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/55465471108.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/i_m_yours_piano_sheet_music_easy.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_off0000c5fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5FA 5148 bytes
SHA-256: 2801ca4a654ccb999544c63a3f31c30974ced6d4f73e325a4a06fa15e77c3ed4
font_01_sfnt_off0000d798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD798 11072 bytes
SHA-256: f7a7e9edf47e4f824c42bf258779b59ed53dea184f9e7b027fbb0af9ce2ffbb2

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