Malicious PDF — malware analysis report

Static analysis result for SHA-256 f125b6fd96eb6ff4…

MALICIOUS

PDF

71.4 KB Created: 2021-03-15 03:10:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 479f79b911698a14e1a8c594664bced2 SHA-1: eea23a58e3e11cb223a55856199f48263bdeee31 SHA-256: f125b6fd96eb6ff49d9094e97d808977ec5c20c3b2b8f3641f18ac17873a5111
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier. It contains an embedded URL that leads to a suspicious domain, likely intended to host malicious content or redirect the user. The document body, though partially corrupted, suggests a lure related to academic search results, aligning with phishing tactics.

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
  • 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://maypoin.ru/award?keyword=jurnal+bronkiolitis+pada+anak+pdf
    • http://seluluxafej.22web.org/website_footer_html_templates.pdf
    • http://lunamawel.22web.org/children_s_croquis_template.pdf
    • http://pedakuf.22web.org/27378922436.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/pusixa/137960456.pdf
    • https://uploads.strikinglycdn.com/files/934fce35-9ca6-4a0c-bab6-b97ffce351c2/napud.pdf
    • http://nelisusopa.epizy.com/o_alquimista_quotes.pdf
    • http://lipesomidu.epizy.com/31225607446.pdf
    • https://s3.amazonaws.com/nawosineromigi/bawenuvinedotixabibe.pdf
    • https://s3.amazonaws.com/patotale/ongc_buyback_offer_tender_form.pdf
    • https://uploads.strikinglycdn.com/files/129fa686-24c0-46b0-8766-596b65c4e80b/where_the_wild_things_are_book.pdf
    • http://kafofatetijusow.epizy.com/fagiv.pdf
    • https://5c90cfa9-af55-48e2-9430-1f3580382729.filesusr.com/ugd/e2b09b_a86e4ec52be243b9a89545f501593a97.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2b1a3bdc-53d3-41d7-8b2a-d161e9c3ad77/nancy_drew_castle_malloy_dolls.pdf
    • http://dimexibagumaza.epizy.com/80736845096.pdf
    • https://s3.amazonaws.com/zonivezada/what_a_machine_learning_engineer_do.pdf
    • https://9a4203bb-6ff2-4ef1-9c63-3f113f84a884.filesusr.com/ugd/ea9bdf_bf212db3481247808b9880455085866a.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cede.bin
ff860716c2dec79b54244c365c804f6f16028ac6aaec03a97a22ac32a41bf495
pdf-font-stream PDF embedded font (sfnt) at offset 0xCEDE 4992 bytes
font_01_sfnt_off0000dfce.bin
8487b1957a50857c3f7ba8fa0ab1e5c3919ee8c025afedb3a4491b7f43e81951
pdf-font-stream PDF embedded font (sfnt) at offset 0xDFCE 10100 bytes
font_02_sfnt_off00010289.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x10289 4324 bytes