Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a0f94015149e171…

MALICIOUS

PDF

63.7 KB Created: 2021-01-30 13:19:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ea298233d0d19206e5fb6b59dba905f1 SHA-1: 85ad7f285530297dff1db6070688e4a4356f8f53 SHA-256: 6a0f94015149e17180fc8833918287ad28643cfdcf115c87ba91978d15d52504
106 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating suspicious external URIs and a link farm on disposable hosting, suggesting a phishing or redirection attempt. The ML classifier strongly flagged this PDF as malicious. While no scripts were directly extracted, the document's structure and embedded links point towards an attempt to direct the user to malicious domains like 'jottigo.ru' and 'ig-supportcenter.xyz' for potential credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jottigo.ru/wb?keyword=starz%20login%20tv%20provider PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4481402/normal_5ff65d08c912b.pdfIn PDF document text
    • http://edevletorg.com/71707940047sb44r.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386605/normal_600a3e7fac9dc.pdfIn PDF document text
    • http://metazexepajesen.22web.org/third_day_child_of_god.pdfIn PDF document text
    • http://ig-supportcenter.xyz/wamokomizefufov0qz7.pdfIn PDF document text
    • http://ronojalad.22web.org/36266906756.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://radagosedapisat.epizy.com/60457247664.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/pearl_fishers_euphonium_duet_sheet_music.pdfIn PDF document text
    • http://maviwapas.epizy.com/java_jre_and_jdk_free.pdfIn PDF document text
    • http://vatekovinewuwa.epizy.com/demain_c_est_toi_piano_sheet.pdfIn PDF document text
    • http://kotidaw.epizy.com/xuwanip.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/38782885889.pdfIn PDF document text
    • http://femikadin.epizy.com/26967721160.pdfIn PDF document text
    • http://vodobugatusexa.epizy.com/battleship_2_tamil_dubbed_movie_tamilrockers.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_off0000bebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEBB 5164 bytes
SHA-256: d5e58628f564e6877722bfbcf602c09c00f63ee5014e8c4f3f01df540c8d0b1a
font_01_sfnt_off0000d067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD067 10092 bytes
SHA-256: ff44bb33c2c2d0296e31ad1f5a70aa606a53682f34d0e6b076ecfb971aefb012

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