Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce9f03f8c5c3f478…

MALICIOUS

PDF

73.4 KB Created: 2021-03-03 16:12:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0dc35fd495f0ef517d4255a60d66a1fc SHA-1: 6a49d3d25c92bdd404099da422285728e905b5b0 SHA-256: ce9f03f8c5c3f4780c8128ef2e470e3560675d24f59efe069a594113cade73a6
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites.

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
  • 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://baarspo.ru/wb?keyword=plantronics%20voyager%20headset%20keeps%20cutting%20out PDF link annotation
    • https://cdn.sqhk.co/jagibuvat/hgfTwPG/motorcycle_racing_helmet_brands.pdfIn PDF document text
    • https://cdn.sqhk.co/lilavokolet/71oDjSd/ganubipareganepokofe.pdfIn PDF document text
    • https://jerupixudenaxi.weebly.com/uploads/1/3/1/4/131437293/1034934.pdfIn PDF document text
    • https://cdn.sqhk.co/rotuzuwibi/aKgehhA/546469573.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451945/normal_5fd6476d3edda.pdfIn PDF document text
    • http://pizedajunar.22web.org/jikobek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369643/normal_602070cf00072.pdfIn PDF document text
    • http://sinoxaju.mygamesonline.org/76418456077.pdfIn PDF document text
    • https://fijudemi.weebly.com/uploads/1/3/4/4/134400988/4ef6931a05.pdfIn PDF document text
    • https://fitijozis.weebly.com/uploads/1/3/4/3/134372299/molaneti-memexiba-wijimikasolag.pdfIn PDF document text
    • https://tipowunukal.weebly.com/uploads/1/3/4/3/134355136/garate.pdfIn PDF document text
    • http://kokolonesafu.getenjoyment.net/53492440454.pdfIn PDF document text
    • http://dududuw.mypressonline.com/ashta_laxmi_stotram_telugu_mp3_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mosararivifu.rf.gd/detail_knowledge_of_tcp_ip_model_and_osi_layer.pdfIn PDF document text
    • http://muresapidun.epizy.com/534274959.pdfIn PDF document text
    • http://tumurubulofomam.rf.gd/xizomadiw.pdfIn PDF document text
    • http://pebuvow.rf.gd/invoice_form_template_html.pdfIn PDF document text
    • http://wigikel.rf.gd/62647896956.pdfIn PDF document text
    • http://bigapenegig.atwebpages.com/how_many_questions_are_on_the_cdl_permit_test_in_california.pdfIn PDF document text
    • http://beritoka.rf.gd/61881089104.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_off0000e1b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B8 5564 bytes
SHA-256: 0a78840e938446b3065a69322551753d8aa7c1de4ab77beae8bfeabe27ed499b
font_01_sfnt_off0000f4a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A8 10424 bytes
SHA-256: 9c0f794d8090952189e8b18c5858acaaf9a1bb7ad87c5cfa2b70579d9e9ceeed

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