Malicious PDF — malware analysis report

Static analysis result for SHA-256 424630a95feee5f0…

MALICIOUS

PDF

119.9 KB Created: 2021-05-21 14:40:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 53d2f50a62a8aea57256c3858ed66397 SHA-1: ec5cf0e2f73938940ccd76806300a3b461f17a82 SHA-256: 424630a95feee5f064e2af174f737d46e3ea763cd865a07b9716722640e10f1e
156 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 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 0.9999

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=wolves%20of%20the%20calla%20audiobook%20free%20download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417830/normal_601fd62ed35c1.pdfIn PDF document text
    • https://butabapob.weebly.com/uploads/1/3/4/7/134744569/fidef.pdfIn PDF document text
    • https://fiziwiminika.weebly.com/uploads/1/3/4/6/134686918/kegedutinaradi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486036/normal_6052ef7ebdc24.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387817/normal_5fe28682a3cfa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c23c9cf-e9f6-47b4-bb73-7e5e789b28ef/nepal_constitution_2072.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/247e07e5-abb8-4de6-bf6d-127a812e2013/teorema_de_moivre_demostracion.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/ireland_rugby_team_sheet_today.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/leponefokoluzawugidosem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82544a0a-928b-4c51-8f72-00267828e7b4/57560007054.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0c8761f-5812-471e-89d3-e7c29946662c/what_are_the_food_of_a_pregnant_woman.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efa23f17-61e8-4229-be96-70eb0845fb36/35329028742.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bbde009-9df1-4f99-9ef8-9764ea0dae9b/ovid_metamorphoses_book_1_poetry_in_translation.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/poxonajitiponazekogubugux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1f41638-b05c-4fb6-9133-76c18b9a7a08/jusatijulujutuxosawan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bb3e177-4d14-46aa-94a4-0889bc195a9f/hoover_floormate_fh40010b_filter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56e2ffb3-fe22-4073-ac17-20ddd5271251/272654272.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70979aa6-7be1-4f42-9097-291a7a415727/letavafinebimatuzineli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81034b4c-eb89-4a04-9523-a369ead3e689/how_to_get_ppf_maturity_amount.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a886817-0d2e-4e20-be64-08259428bf90/gesosimelalagima.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_off000197e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x197E1 5480 bytes
SHA-256: 9bfdb2699f5bd6a4f36b440b96fee7051f47defff5db129f07a446554bfd10f6
font_01_sfnt_off0001aa9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AA9B 11176 bytes
SHA-256: 45c3204f00904b5687ea2b5a9d896f3b1bf2f89cc905c73e7a9d604916f63b5e

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