Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b928d7f10e78114…

MALICIOUS

PDF

79.1 KB Created: 2021-05-31 16:52:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a613ab993e85182183f23a3403b51473 SHA-1: 085fbfb7236146809c319065775df41c7dca29fe SHA-256: 8b928d7f10e7811433707bb0d684079d29955773d2e33600332e14fcf73d255a
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/123?utm_term=app+bancoposta+android PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4456132/normal_5fdf934827d0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401983/normal_605a6b4e8ff67.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jesababa.pbworks.com/f/nisawa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4857a17-1091-420a-94f2-b0dfbaa70b84/how_much_does_it_cost_to_buy_a_subway_franchise_in_the_uk.pdfIn PDF document text
    • http://zopujoxobug.pbworks.com/f/when_is_s9_plus_getting_android_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59e4c5f3-e3d6-4731-85f4-4f0ef0bbfde8/13476571049.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44ef3aeb-4249-4676-a5e2-d84d37654ad4/bozezivuxexif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/656ae8c1-4412-47fe-a82b-e5157ee314da/62055052854.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64b68951-c3be-48a5-b9b1-3cb44bc33b1e/73128802822.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/354ac7eb-ee47-480e-bcdc-726bf7694575/imagenes_de_frases_del_libro_el_caballero_dela_armadura_oxidada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48b448c3-bd01-497a-9eb5-2c2d0302c55b/wurotofe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66b3f39e-0776-448e-8d64-45b4304f2592/artificial_intelligence_with_python_prateek_joshi_github.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51ce5f73-e424-44c5-8a1d-07cadf24c0c1/pefodiwisuzetodoxavopiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd716f4e-8528-4ffc-b148-046366fdb76a/97939908702.pdfIn PDF document text
    • http://gajufabeke.pbworks.com/w/file/fetch/144412791/the_joy_of_creation_halloween_edition_android_download.pdfIn PDF document text
    • http://wuranosa.pbworks.com/w/file/fetch/144412635/butelafikom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bedbb4b-f814-4ce0-8b99-c45258950bea/setting_stc_1000.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/026f3069-733a-4c9f-8b40-07aa23a61a56/setitok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b031d303-a41b-4ff2-a058-118264374cab/cashflow_quadrant_chapter_7_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/439a1613-d5a2-4a65-9431-58199afc0629/93986044522.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF948 5164 bytes
SHA-256: 7f732c68694753f570f6ac000c75a1736d6debb231794ce4aab073dde2927174
font_01_sfnt_off00010ad9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD9 10772 bytes
SHA-256: 22728c1f034ab91fa1b3ecbc50d46f0944d0b44eff8f7c35e0839a9822a4c30c

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