Malicious PDF — malware analysis report

Static analysis result for SHA-256 84056dbf9b96a228…

MALICIOUS

PDF

78.0 KB Created: 2021-06-09 05:04:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3f28850931ce579a1d89a9afd77aa09f SHA-1: 1c8de6cb7c371db6f0eb9f96ca39f303dc60e156 SHA-256: 84056dbf9b96a2281e8e9c9fcd5e7c632bc54162cf93865d139fe00e25aeeeea
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://infrive.ru/pbw?utm_term=how+to+turn+on+a+farberware+air+fryer PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450628/normal_6056fd0a28b1b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474449/normal_5ffde334cc951.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372737/normal_5fca33fa59be8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391621/normal_5fcc8f37f0c7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474977/normal_603e5df29f715.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413578/normal_6056b136ea5d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478688/normal_60bcb21f48d55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444100/normal_60bdce4d91597.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415068/normal_5fda546036ebb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zewalar.pbworks.com/f/how_to_collect_dragon_bones_rlcraft.pdfIn PDF document text
    • http://xoxafepapesu.pbworks.com/f/ea.com_unable-to-connect_madden_21_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/472860dd-c0ff-4741-aaf7-45d60197093d/cules_son_los_ngulos_agudos_rectos_obtusos_y_llanos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaf6a7cc-08d3-43c2-9ad0-9e7739bbdac1/ge_healthcare_service_number.pdfIn PDF document text
    • http://safopiluzaw.pbworks.com/w/file/fetch/144894000/todizatemogekogem.pdfIn PDF document text
    • http://lijegazoz.pbworks.com/w/file/fetch/144416370/4391314096.pdfIn PDF document text
    • http://masawumel.pbworks.com/f/how_to_pass_the_mblex_exam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef6482f9-fc89-4ce4-8e61-d91b467cc3dc/81009766281.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1824f8d5-3f49-4d1b-a0be-27a8c91f6602/lopipowigapa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e01aad05-c265-49cd-854f-7b8007430375/xuxixaraforofaduxivani.pdfIn PDF document text
    • http://daladefadus.pbworks.com/w/file/fetch/144870747/simple_present_tense_reading_comprehension_multiple_choice.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_off0000f4bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BD 4848 bytes
SHA-256: eeb8c23c8acbaea47def21301e24506c0723920cc9880dcc5a6af5944ed8b817
font_01_sfnt_off0001055f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1055F 10928 bytes
SHA-256: 6ee0c7418076025bb05d16dd2ad922dc48b9327e65b1fb3715a4ce7a5ebaf4d0

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