Malicious PDF — malware analysis report

Static analysis result for SHA-256 171876368bc2dbb2…

MALICIOUS

PDF

69.4 KB Created: 2021-02-14 22:11:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 33267e1a223b977e1c52e7d545702572 SHA-1: 2509fe7c7f778e0f544ee219e765834afaf7511e SHA-256: 171876368bc2dbb2cd96e3ece210593d7019426b615c7dc50cb87815f2f3b65d
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://yafferge.ru/wix?keyword=wristech+blood+pressure+monitor+instructions In PDF document text
    • http://detonicinitalia.website/uc_browser_apps_for_java_mobilec0hj5.pdfIn PDF document text
    • https://raguwagoneneza.weebly.com/uploads/1/3/1/3/131384547/zuridu_dixan.pdfIn PDF document text
    • https://jejaparax.weebly.com/uploads/1/3/5/3/135332208/d10892c.pdfIn PDF document text
    • https://dijibelusubif.weebly.com/uploads/1/3/4/8/134871127/tizidowudovapusomil.pdfIn PDF document text
    • http://italiahot.space/docker_in_action457j7.pdfIn PDF document text
    • http://tublitalia.fun/cortex-_m7_user_guide_reference_manualu7y42.pdfIn PDF document text
    • https://tupirusu.weebly.com/uploads/1/3/4/7/134702138/nilelise.pdfIn PDF document text
    • https://cdn.sqhk.co/gemadaruvow/kjgcid7/lixefoz.pdfIn PDF document text
    • http://zutixononazetu.iblogger.org/aitt_marksheet_2018.pdfIn PDF document text
    • https://fafafupoxojamu.weebly.com/uploads/1/3/5/3/135350358/diwevafi.pdfIn PDF document text
    • https://cdn.sqhk.co/pekotegafod/erdooja/draw_a_stickman_epic_2_color_buddies.pdfIn PDF document text
    • http://uscreditcheck.info/19955837726jv7e6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pipiwilevo.rf.gd/dolefimirojaw.pdfIn PDF document text
    • http://pulupalu.epizy.com/64570961426.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_off0000d498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD498 5256 bytes
SHA-256: 05aa36ff3dadf94cf4832b9e1a536f844017c6d6995210f65611db818111018b
font_01_sfnt_off0000e655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE655 10048 bytes
SHA-256: 4f653e5caaececd20490cd55c24e63c041c7431f6d81bcfbb7f92256720e8bee