Malicious PDF — malware analysis report

Static analysis result for SHA-256 c927231ebb99b191…

MALICIOUS

PDF

74.3 KB Created: 2021-02-17 17:19:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 184e5681eaca6409b4719d97e90049a3 SHA-1: f23e95b22bcbaab903b2156c5f7a79c448df4037 SHA-256: c927231ebb99b191ebd9b95b631949efeb49bb322e7ee5267ff77dd2beadb80d
126 Risk Score

Malware Insights

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

The PDF document contains numerous external URIs, many of which point to disposable hosting or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be a lure related to a movie title, directing users to a URL that likely serves a malicious payload or phishing page.

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
  • 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://bologen.ru/wb?keyword=do%20trevor%20and%20tessa%20get%20together%20in%20after%20we%20fell PDF link annotation
    • https://cdn.sqhk.co/sokavuwoz/egi0Shg/masijatupinujup.pdfIn PDF document text
    • http://idealslim-italiaoficial.site/karr_alarm_problemsngi43.pdfIn PDF document text
    • http://emmetrix.net/biblia_de_liderazgo_john_maxwell_gratisfoqcp.pdfIn PDF document text
    • http://world-wildshop.com/nukaguledokejadisoxudaze69icx.pdfIn PDF document text
    • http://kozlo.space/aires._dll_cs67q3zt.pdfIn PDF document text
    • https://cdn.sqhk.co/gokovolasula/gjcheUs/gefinadupeloji.pdfIn PDF document text
    • https://cdn.sqhk.co/gituridewo/gh1gjpA/josobuxo.pdfIn PDF document text
    • http://copyright-security-ig.com/26574937578q7e4d.pdfIn PDF document text
    • http://wtia.space/torawulatogijoro9t726.pdfIn PDF document text
    • http://groby-ritual.online/rebel_without_a_crewehj07.pdfIn PDF document text
    • http://faceskinagainbeauty.xyz/24985162053f8xjf.pdfIn PDF document text
    • http://thecabinets.xyz/ccna_1_chapter_3n8d0v.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/bisegilupuf/barbados_passport_application_form_for_minors.pdfIn PDF document text
    • http://wofukisunoxo.epizy.com/backtesting_report_example.pdfIn PDF document text
    • https://s3.amazonaws.com/natewared/gemisekonekewikuto.pdfIn PDF document text
    • http://bidetorula.rf.gd/14347248844.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_off0000e653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE653 5320 bytes
SHA-256: eca908632836a09e6393bfb7044413324c4f78ba4f7a1f30a43aa3b4e4969007
font_01_sfnt_off0000f882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF882 10356 bytes
SHA-256: 0b87a40af7e60c80e712158818028d0576a657f1831eddc4ba9191666dea9770

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