Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f8238eab09766dd…

MALICIOUS

PDF

78.4 KB Created: 2021-03-12 03:23:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 89859c239b08a2a9d863747709b28881 SHA-1: 24a538c66bab89f897177d0d1213ebea91284d6c SHA-256: 0f8238eab09766ddab88a224e2f1990d9721eac770ffae3ebb67ca2bcae814bb
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/award?keyword=english+sentences+for+speaking+pdf PDF link annotation
    • http://naliputa.mywebcommunity.org/how_to_do_six_sigma_certification_in_india.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468267/normal_5fe0fb5d96645.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474978/normal_5fec930c0abf7.pdfIn PDF document text
    • http://kobazugipodiv.medianewsonline.com/40380632851.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407087/normal_60082a4656828.pdfIn PDF document text
    • https://rajarajo.weebly.com/uploads/1/3/1/3/131398110/tafaniwofim.pdfIn PDF document text
    • https://junimadegerozo.weebly.com/uploads/1/3/4/0/134096607/latewob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384029/normal_603afaaa809de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427780/normal_6015bbccb394e.pdfIn PDF document text
    • http://kesuvajeb.scienceontheweb.net/danavo.pdfIn PDF document text
    • https://vosumizajemuji.weebly.com/uploads/1/3/4/0/134041682/4772770.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453718/normal_6038d5dd3a074.pdfIn PDF document text
    • http://tokesuditetu.getenjoyment.net/delta_table_saw_fence_upgrade.pdfIn PDF document text
    • http://fikosarodone.medianewsonline.com/bukowski_libri.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tarajix/annexure_c_form_export.pdfIn PDF document text
    • http://fusozevukatamir.atwebpages.com/robotic_arm_design_thesis.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/sekurasigeboj.pdfIn PDF document text
    • http://nejimafalun.onlinewebshop.net/when_to_remove_infant_insert_in_car_seat_maxi_cosi.pdfIn PDF document text
    • http://gajopule.myartsonline.com/zabagoda.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e04a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE04A 5224 bytes
SHA-256: 449fe2c397ec6597c3ae22d25fd9173660ea36bc58bd52fbb4090655ce0f31ea
font_01_sfnt_off0000f1fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FC 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off0000fa89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA89 10420 bytes
SHA-256: 5df5def91d846741018217fd7d0d8e4a0d4b63d106d16bee181c8dafbe3f6797
font_03_sfnt_off00011e12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E12 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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