Malicious PDF — malware analysis report

Static analysis result for SHA-256 88d1fb248d6d843e…

MALICIOUS

PDF

77.7 KB Created: 2021-02-28 08:45:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: e150e96ae64c34eb4f712f5428c2426b SHA-1: 9fbde46abc00dbcdff8ba243e9c5e4a6cc3d01b4 SHA-256: 88d1fb248d6d843edf03ac112d486fd57b139f43b494bc842823f635dbffc3d5
154 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical alert for a redirector link to 'crophysi.ru'. The ML classifier also assigned a high probability of maliciousness. While no scripts were extracted, the presence of a malicious redirector URL suggests the document is designed to lead the user to a compromised site, likely for phishing or to download further malicious content.

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/wix?keyword=composting+worksheets+high+school In PDF document text
    • http://tuderoba.getenjoyment.net/electrical_engineering_entry_level_jobs_san_diego.pdfIn PDF document text
    • http://xudowalovafu.iblogger.org/66555060219.pdfIn PDF document text
    • http://bikelumonekodex.mygamesonline.org/72203306401.pdfIn PDF document text
    • http://lozotago.iblogger.org/authorship_of_the_book_of_revelation.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/rakabexozu/96103181151.pdfIn PDF document text
    • http://titugol.atwebpages.com/87107260050.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/73508446497.pdfIn PDF document text
    • http://bitines.myartsonline.com/kedaganifurinaxum.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/dandelion_plant_information.pdfIn PDF document text
    • http://gixojur.epizy.com/kutix.pdfIn PDF document text
    • http://fuvuvadut.onlinewebshop.net/a_christmas_carol_short_story_version.pdfIn PDF document text
    • http://jogebelofes.epizy.com/siduraximo.pdfIn PDF document text
    • http://wotituxisu.rf.gd/font_awesome_5_font_family.pdfIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/32524970585.pdfIn PDF document text
    • http://dorediludopa.epizy.com/zokerulonarabamunax.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/etea_entry_test_guideline_facebook.pdfIn PDF document text
    • http://mujozitovisiwud.rf.gd/22400565071.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/aerobic_music_for_instructors_free.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_off0000f547.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF547 5196 bytes
SHA-256: 89405686a0e48353b47b98b8e328ebcbf4101cea4b7ad5a3ebfc570939511f5e
font_01_sfnt_off000106df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106DF 10148 bytes
SHA-256: 6edfbd0df36e5cc036a535ce702b57daebcbd61a6d2a2b6a81300526f845c018

Open this report in the interactive analyzer, or submit your own file for analysis.