Malicious PDF — malware analysis report

Static analysis result for SHA-256 69d5e7e2468e6403…

MALICIOUS

PDF

69.3 KB Created: 2021-02-26 01:14:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: e963d1e2ce5a3bfb33a56cb16b0fe604 SHA-1: 4f4ceffaab9d6dc3d60dfb85851a86912800291a SHA-256: 69d5e7e2468e640382e6ab05fbbf12ca5e87e18598a6a193687c9645daa2068b
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs pointing to suspicious domains, with one heuristic explicitly identifying a link to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to downloading a PDF, suggesting a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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.
  • 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/strik?utm_term=descargar+caballo+de+troya+2+pdf In PDF document text
    • http://kakafeg.scienceontheweb.net/6701826624.pdfIn PDF document text
    • https://cdn.sqhk.co/rexixugepir/0m6pniQ/68934655183.pdfIn PDF document text
    • http://sevezor.scienceontheweb.net/how_does_yeast_infection_affect_a_woman.pdfIn PDF document text
    • http://mojadejazisapa.sportsontheweb.net/jotul_f_600_review.pdfIn PDF document text
    • https://cdn.sqhk.co/sewizefaxiki/bbWOxrX/bedroom_furniture_sets_full_bed.pdfIn PDF document text
    • http://microbestdigitalmeter.xyz/81954189430u8qv9.pdfIn PDF document text
    • http://woxijakuzadajew.getenjoyment.net/lafuxilexotiw.pdfIn PDF document text
    • https://cdn.sqhk.co/fezusife/PjjF4he/nenilugezinitotifivas.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/farefasejikap/domegumij.pdfIn PDF document text
    • http://bivojeda.atwebpages.com/73906438414.pdfIn PDF document text
    • http://bajivuselome.epizy.com/wotibuvefepokabelezolixi.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/dixivejekapedinop.pdfIn PDF document text
    • http://zatuvejamubolo.atwebpages.com/92828220762.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_off0000cd51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD51 5696 bytes
SHA-256: 08c85d108b61c82226668328f4e1dbdd75b05072b27b57b639368e7098833b09
font_01_sfnt_off0000e0d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D5 11716 bytes
SHA-256: 11547142ee64daedc53cb54a0f472e301e8129d277eeec5aa752a0a510c4a4f3

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