Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0bce2fff49c6a22…

MALICIOUS

PDF

72.4 KB Created: 2021-02-17 19:38:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ac5e651d3dbf09e73e4a89d194335a1c SHA-1: 72cc7e67d3ed9b5f877d6035640676d23a39a984 SHA-256: d0bce2fff49c6a224b3de6e9578f9189e3fafe3c3c56ab743e3bf7d94920171f
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://yafferge.ru/wix?keyword=implicit+differentiation+worksheet+with+solution In PDF document text
    • https://wuzakadebetes.weebly.com/uploads/1/3/0/8/130814976/402890.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426066/normal_6016a70e6bc64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443341/normal_601bfb4523015.pdfIn PDF document text
    • https://pejilajapife.weebly.com/uploads/1/3/4/4/134477767/xinivapumetiweb.pdfIn PDF document text
    • http://zipufofofize.22web.org/sas_enterprise_guide_libname_server.pdfIn PDF document text
    • http://winnerslm.space/ouroboros_dragon_breeding_timew9hml.pdfIn PDF document text
    • http://pusokum.66ghz.com/chogada_tara_song_free_mp4.pdfIn PDF document text
    • https://cdn.sqhk.co/jidulopavoji/hbjbBHz/encyclopedia_set_price_list.pdfIn PDF document text
    • https://cdn.sqhk.co/diridenafa/4hiQUpD/life_simulation_games_pc_2019.pdfIn PDF document text
    • http://digitaloffice24.ru/2-_way_anova_table_apa_format8pzaw.pdfIn PDF document text
    • http://tonipoj.iblogger.org/riboxaz.pdfIn PDF document text
    • https://wokulenazaxur.weebly.com/uploads/1/3/4/7/134744474/364194.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://borovob.epizy.com/pojagusulidonola.pdfIn PDF document text
    • http://gonuzalujulogab.rf.gd/the_three_body_problem_liu_cixin_free_download.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_off0000d5ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5EE 5488 bytes
SHA-256: 77712d614a63c20745c0bb2d0545b5b0533e264acefdbdf5413f5b556d6d2fcd
font_01_sfnt_off0000e881.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE881 13840 bytes
SHA-256: bdeb1abe4c055ea0c03c7afeceff9930ab44b932a79205466b5c5c2ea2c70a66