Malicious PDF — malware analysis report

Static analysis result for SHA-256 25eedd49d7074f14…

MALICIOUS

PDF

86.7 KB Created: 2021-02-22 02:14:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ecab4f24461eae5bea051d300d45a160 SHA-1: 941c9265e758c2e023e68610e665a9dad62bb3af SHA-256: 25eedd49d7074f143de9754168ce0c781a13a700a5248698a3777bf06c37c4ce
136 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which leads to a suspicious domain hosting another PDF. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of external URIs and suspicious links points towards a social engineering attack aiming to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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/wix?keyword=minecraft+land+generator
    • https://cdn-cms.f-static.net/uploads/4490122/normal_601f2b74a05f8.pdf
    • http://biluber.22web.org/72128633069.pdf
    • http://com-login8.xyz/call_log_of_any_mobile_numberq8y54.pdf
    • https://static.s123-cdn-static.com/uploads/4420037/normal_5ff7d75d2acd7.pdf
    • https://cdn-cms.f-static.net/uploads/4480598/normal_6029c39d4c6d8.pdf
    • http://reduslim-ordina.site/xutufusupujotelamebolc27ae.pdf
    • https://static.s123-cdn-static.com/uploads/4471703/normal_5ff3f2d9944f8.pdf
    • http://hookup750.website/happy_birthday_music_sheetodpvw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tamovagag/inservice_sign_off_sheet.pdf
    • https://s3.amazonaws.com/zafijukopa/13909181556.pdf
    • https://s3.amazonaws.com/tugabijenovili/10th_mark_sheet_2019.pdf
    • https://s3.amazonaws.com/wovisak/canabalt_descargar_para_android.pdf
    • https://s3.amazonaws.com/titugome/answering_machine_detection.pdf
    • https://s3.amazonaws.com/wazotojemov/sweet_baby_boy_pics.pdf
    • https://s3.amazonaws.com/fidobakipivogit/oblicza_geografii_atmosfera_sprawdzian.pdf
    • https://s3.amazonaws.com/jolozidabi/financial_report_format_in_excel_free.pdf
    • https://s3.amazonaws.com/fapaga/60961112949.pdf
    • https://s3.amazonaws.com/nodetuxapabara/lovevonamavifabidaxolefu.pdf
    • https://s3.amazonaws.com/dosalapasenow/rubulevawumorogivabar.pdf
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000113ec.bin
58f2c2707bb885eb920114f4461c67c72df9ead678a5c2f3d486498d92fe6d87
pdf-font-stream PDF embedded font (sfnt) at offset 0x113EC 5016 bytes
font_01_sfnt_off00012517.bin
67b228ced8f695125b1a383d923218c99509dfbd75dda6619405604344da922f
pdf-font-stream PDF embedded font (sfnt) at offset 0x12517 12168 bytes