Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7e4bff58ae6a7d6…

MALICIOUS

PDF

64.5 KB Created: 2020-11-25 18:35:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7b6fbef90a7f8b274e6ef28bfa7d62db SHA-1: c84673b19c616c9d84c77ed8b1b2cd48eb0e5dbc SHA-256: d7e4bff58ae6a7d68bc356d809f853bf2b951c8633aa69b6e1c5d20cf7140941
124 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs that point to a link farm hosted on disposable domains, with one URL specifically identified as a known malicious redirector. The ML classifier also flagged this PDF with high confidence. The presence of these links suggests an attempt to lure the user to malicious infrastructure, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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/strik?utm_term=white+space+is+not+your+enemy+pdf In PDF document text
    • https://jiwugulepegewi.weebly.com/uploads/1/3/4/7/134717460/1705548.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390642/normal_5f98eeea249e7.pdfIn PDF document text
    • https://tuwunujanopir.weebly.com/uploads/1/3/4/6/134617400/lutes.pdfIn PDF document text
    • https://rubazepenomul.weebly.com/uploads/1/3/4/3/134324915/metorikeroguv-todosivegux-zizivowedarow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369900/normal_5f8a96acbf3e5.pdfIn PDF document text
    • https://roxomutina.weebly.com/uploads/1/3/4/6/134663133/sowuxuligoku_muxuk_lopuwomunuje_xodatira.pdfIn PDF document text
    • https://sevivuninuk.weebly.com/uploads/1/3/4/4/134459749/3877947.pdfIn PDF document text
    • https://mekozatopuwuju.weebly.com/uploads/1/3/4/5/134512494/fofuleworimonemiw.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/vonusirukete/literozit.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/blank_thermometer_goal_picture.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/fabofubu.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/27738777572.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_off0000bf2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF2D 5480 bytes
SHA-256: db1faa0a66b1222519b4b6fbd2d07ad0cf849a59fbbf519a8dc623f2557ba160
font_01_sfnt_off0000d1b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B9 10232 bytes
SHA-256: 8cf0e279ca6d968adfd60a004abb6c785ec8bc1ac49131aa475d398f3bde76d6

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