Malicious PDF — malware analysis report

Static analysis result for SHA-256 fae96d31a4cdf07b…

MALICIOUS

PDF

67.1 KB Created: 2021-01-21 15:43:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 35254da3546f985e61757bfcf5e738d9 SHA-1: fbad2fc720d5efb05aad1bb8955ce24c997160dd SHA-256: fae96d31a4cdf07b3bf2d27270923cfcf993752ca8d8ad4811706b7516682b9f
184 Risk Score

Malware Insights

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

This PDF file contains multiple embedded links, with at least one directing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, appears to contain keywords related to a product, suggesting a lure for a phishing campaign.

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://traffking.ru/123?utm_term=j7+crown+case+and+screen+protector In PDF document text
    • https://site-1245992.mozfiles.com/files/1245992/desoranire.pdfIn PDF document text
    • https://cdn.sqhk.co/dopiporajen/hsdheVR/tojiderepidebofame.pdfIn PDF document text
    • https://cdn.sqhk.co/mogizilo/FjeJjdw/anysoftkeyboard_russian_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/pewovixosafu/jhcGhCV/at_t_visual_voicemail_ios.pdfIn PDF document text
    • https://site-1177386.mozfiles.com/files/1177386/74851140762.pdfIn PDF document text
    • https://site-1179363.mozfiles.com/files/1179363/fox_tv_hits_guide.pdfIn PDF document text
    • http://naguvogegexaze.22web.org/dosipajipixu.pdfIn PDF document text
    • https://cdn.sqhk.co/mujowofapubi/cigehbx/zepunepuresibezubedizel.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafanez/1zgwdNc/39224276230.pdfIn PDF document text
    • https://site-1176856.mozfiles.com/files/1176856/bexumubed.pdfIn PDF document text
    • https://cdn.sqhk.co/fapewejav/itZbuhd/65851080834.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vufagozujidivu.epizy.com/17357006443.pdfIn PDF document text
    • http://sewekovekejir.epizy.com/prokaryotic_and_eukaryotic_cells_worksheet_middle_school.pdfIn PDF document text
    • http://kujujigufa.epizy.com/balsamo_bengue_pomada_bula.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_off0000ca14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA14 5196 bytes
SHA-256: 35688637df810f27fee473f54dd76b20ea60ac06f85b22a3ff991f34a0d81e24
font_01_sfnt_off0000dbea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBEA 10560 bytes
SHA-256: 52cf0a96313b1bf8c956ab34454d4fc4fb164c040f43ade8741703e6462d42e1

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