Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8e3ad71204a8efa…

MALICIOUS

PDF

74.9 KB Created: 2021-01-16 12:22:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: bdd750ff63d1398565c8cb2e4265f9b7 SHA-1: b32d0824252f88f0e71e5fb1d137e2d96c0557c1 SHA-256: e8e3ad71204a8efab12cea9882bc72cacca6b9a12907e91bcc2b7112aa6c3d84
184 Risk Score

Malware Insights

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

This PDF file is classified as malicious by ML models and ClamAV, and contains embedded links pointing to known malicious redirector infrastructure. The document appears to be a link farm designed to drive traffic to disposable hosting, with one prominent URL being 'https://ggtraff.ru/123?utm_term=gas+tax+increase+illinois'. No scripts were extracted, but the presence of malicious links indicates a phishing or redirection attempt.

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
  • 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://ggtraff.ru/123?utm_term=gas+tax+increase+illinois In PDF document text
    • https://site-1250990.mozfiles.com/files/1250990/15388697921.pdfIn PDF document text
    • https://cdn.sqhk.co/muxigatatini/hhPhjjc/81443259319.pdfIn PDF document text
    • https://cdn.sqhk.co/dodiniwotud/ojbhaho/movie_shark_addon.pdfIn PDF document text
    • https://zilakakazaxo.weebly.com/uploads/1/3/4/4/134442972/rewawifozolidexu.pdfIn PDF document text
    • https://site-1194623.mozfiles.com/files/1194623/14956448993.pdfIn PDF document text
    • https://cdn.sqhk.co/sawitofi/jbhfgc5/armaan_malik_telugu_songs_for_allu_arjun.pdfIn PDF document text
    • https://cdn.sqhk.co/peferitukofa/jy0Dyie/mickey_mouse_castle_of_illusion_sega_walkthrough.pdfIn PDF document text
    • https://site-1176155.mozfiles.com/files/1176155/94224332682.pdfIn PDF document text
    • https://rabifupokuwu.weebly.com/uploads/1/3/1/1/131164250/vebokupameseroru.pdfIn PDF document text
    • https://dizufarul.weebly.com/uploads/1/3/1/3/131379939/9302449.pdfIn PDF document text
    • https://lesofetu.weebly.com/uploads/1/3/1/3/131378838/konuris.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/jijari/vidmate_app_install_new.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_off0000e6eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6EB 4892 bytes
SHA-256: 9a8d25cbc22ed22645bd5946d0c44b5d98555bff32abdda7cb67c1babe9e3a79
font_01_sfnt_off0000f7a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A3 12384 bytes
SHA-256: 99bbbb7c0a8bff1a857360ed12c2cd9d734c580bd68fb05e82e298f3275ad330

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