Malicious PDF — malware analysis report

Static analysis result for SHA-256 565646b09e4fbc20…

MALICIOUS

PDF

69.4 KB Created: 2021-01-11 17:54:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 4991b86c3ad819b2dceac4b6b8fa4284 SHA-1: 923d2b898e75f135ac0c31582d9ace8019d5b3f9 SHA-256: 565646b09e4fbc20a7cb23bfe9ff64dad4f261b67a591625c7a88d351c2c020b
184 Risk Score
Tags
free-cdn-ebook-manual-lure

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, indicating a high likelihood of malicious intent. It contains a large number of embedded URLs, with at least one identified as a known malicious redirector. The document body is heavily obfuscated, but the presence of numerous links suggests a phishing or redirection scheme designed to lead users to harmful content. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gettraff.ru/aws?utm_term=alimentos+altos+en+vitamina+d+pdf In PDF document text
    • https://site-1166608.mozfiles.com/files/1166608/2734465892.pdfIn PDF document text
    • https://gurigibafex.weebly.com/uploads/1/3/0/7/130739571/sedomu_tetas_fijenif_malonakafeli.pdfIn PDF document text
    • https://cdn.sqhk.co/tidaxetosi/im9aQgg/kopuzorulu.pdfIn PDF document text
    • https://site-1172607.mozfiles.com/files/1172607/makeup_slime_fluffy_rainbow_slime_simulator.pdfIn PDF document text
    • https://betiriwusogaz.weebly.com/uploads/1/3/1/3/131380032/882494.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443801/normal_5fdb926e6685b.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzosexiwugu/gihaifW/honda_gx_motor_specs.pdfIn PDF document text
    • https://mifanalukuzesu.weebly.com/uploads/1/3/4/6/134688284/8094646.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/tapexiw/fejopukegidu.pdfIn PDF document text
    • https://s3.amazonaws.com/moduluzuxikari/41197753375.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_off0000d0eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0EB 5140 bytes
SHA-256: 6b6641297726be2aca9b79e96767930639c4ee0577c6cbc85e8af22b76571aaa
font_01_sfnt_off0000e263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE263 11328 bytes
SHA-256: a20ebf691063b630e441f7bddcec3727caa02791ee449703af767a9393b25ead

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