Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ace0d76ccf13771…

MALICIOUS

PDF

72.7 KB Created: 2021-01-14 21:55:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d66725614d5fe754cda9a0176915201a SHA-1: d06a13589ea8165366e3f53a75b5538e38ccd4fb SHA-256: 4ace0d76ccf137716ddeabbdd162fbde06e84e616a82a5a54c0d74ceea7a718f
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier. It contains numerous embedded URLs, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, suggests a lure related to game downloads or similar topics, consistent with phishing or malware distribution. No scripts were extracted, but the presence of malicious links indicates an attempt to redirect the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://traffmen.ru/wb?keyword=rocketball%20championship%20cup%20hile%20apk%20day In PDF document text
    • https://site-1176636.mozfiles.com/files/1176636/instagram_followers_app_download.pdfIn PDF document text
    • https://refanoripusegu.weebly.com/uploads/1/3/4/3/134306014/zijokup.pdfIn PDF document text
    • https://jenajurowob.weebly.com/uploads/1/3/1/4/131408252/buronudu.pdfIn PDF document text
    • https://site-1166067.mozfiles.com/files/1166067/32466035214.pdfIn PDF document text
    • https://site-1176922.mozfiles.com/files/1176922/jusepexixeravaxu.pdfIn PDF document text
    • https://site-1178487.mozfiles.com/files/1178487/54005594092.pdfIn PDF document text
    • https://radutarogo.weebly.com/uploads/1/3/4/3/134379411/seruremewipizir.pdfIn PDF document text
    • https://site-1215606.mozfiles.com/files/1215606/galaxy_on_fire_2_best_ship_base_game.pdfIn PDF document text
    • https://sufudoni.weebly.com/uploads/1/3/4/8/134853368/7108113.pdfIn PDF document text
    • https://site-1181017.mozfiles.com/files/1181017/electric_guitar_sounds_tinny.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/dutimajizowa/54704468965.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/health_administration_vs_health_information_management.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/patizadabizekuvazi.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/basic_analog_and_digital_electronics.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_off0000d9de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9DE 5672 bytes
SHA-256: cf9d48356b99e10ec372583f6217956ce896a22d4d0338f18301cfe78c1814e4
font_01_sfnt_off0000ed0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED0B 12740 bytes
SHA-256: 57ee83a44445dbd777f63884de0554b12431c967cf6b841098f75b2866760211

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