Malicious PDF — malware analysis report

Static analysis result for SHA-256 c82ff453efdc4f68…

MALICIOUS

PDF

77.7 KB Created: 2021-02-25 16:37:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 978a826da751ce438783ee3c8d3910e5 SHA-1: 7bcf243e04d1d2acf02a29cdb8f2fe6f62b65e3b SHA-256: c82ff453efdc4f68e4377df20412285689ce9c2ef5ada36d190cc9b4e32000d7
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to disposable domains and known malicious redirectors. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/award?keyword=how+do+you+cook+chicken+casserole+in+a+slow+cooker In PDF document text
    • http://brumbum6.xyz/todojozizatovox1jc4.pdfIn PDF document text
    • https://metenesepagozo.weebly.com/uploads/1/3/4/7/134710396/9676c8cfb2badb.pdfIn PDF document text
    • http://kinemulawaw.sportsontheweb.net/sword_art_online_alicization_lycoris_update_1.11.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/binomial_theorem_expansion_worksheet.pdfIn PDF document text
    • https://bazubipevudupu.weebly.com/uploads/1/3/4/8/134876407/4094886.pdfIn PDF document text
    • http://jaralet.getenjoyment.net/how_to_become_a_1st_grade_teacher_in_texas.pdfIn PDF document text
    • http://uscreditreport.info/glg_balanced_managed_fund_fact_sheetqb7qm.pdfIn PDF document text
    • http://futup.ru/medio_hipotonico67a6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391898/normal_60108fef9af23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407788/normal_602be1569f91c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375342/normal_5fd2eef4793f9.pdfIn PDF document text
    • https://bajipupetezin.weebly.com/uploads/1/3/5/3/135315063/819c155f85.pdfIn PDF document text
    • http://voicebftyi.com/clasificacion_del_derecho_de_seguridad_socialcuvrj.pdfIn PDF document text
    • http://zememor.sportsontheweb.net/what_is_the_9_box_model.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/zagapaxa/sowapizalikubiboforevukab.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/fo4_mod_guide_reddit.pdfIn PDF document text
    • http://pojozija.onlinewebshop.net/36764666249.pdfIn PDF document text
    • https://s3.amazonaws.com/borokegujuzero/saviwa.pdfIn PDF document text
    • http://tavoxelelenasi.onlinewebshop.net/the_selection_book_4_kiera_cass.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_off0000f3ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3BA 5248 bytes
SHA-256: 597f651c35feeb8f1e8e0174428b9b8ddfe05da90aba0f036f5acd2eb6a31e11
font_01_sfnt_off0001059e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1059E 10472 bytes
SHA-256: 22315dbd39cfd961d747c4bb5be8fce9a90c12060c057f1cf511965b2b87dfaf

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