Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eb0e280a710fe07…

MALICIOUS

PDF

73.9 KB Created: 2021-04-01 03:56:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 0b996e92ee71398b39feafa92fd1d80e SHA-1: 57fbd288d65c26d772464ef2529d623201e1c9d8 SHA-256: 3eb0e280a710fe07d0af0e143b9ee4d9a99742bfaccd11dcb5d70ad0145153a6
186 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 0.9998

Heuristics 6

  • 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.
  • 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://xajibur.ru/wix?keyword=wichita+tribe+tools PDF link annotation
    • http://dotenipago.medianewsonline.com/are_any_vampire_diaries_characters_in_the_originals.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/86e23036-830b-4925-82a8-fa0b0b3b53b4/when_does_power_book_2_come_on_netflix_uk.pdfIn PDF document text
    • https://356bbf58-84af-4bff-99a9-d03346e46411.filesusr.com/ugd/b5472a_aa1e91209aa14213aaec0d615dbf5206.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/furunumaroxun/nojudigamorotexukurawo.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/kuboxabemokakupulavus.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/wasekabusix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/651b5679-7819-471e-8877-fa39192cdffa/jblm-lewis_main_visitor_center.pdfIn PDF document text
    • https://3c199e1c-ff83-4553-a351-db1e9419129c.filesusr.com/ugd/424a74_0add3c0b188e46d89eda49b4c114060a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6de6fb0-3077-43c3-a759-5023eeb17199/which_43_inch_4k_tv_is_best_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d705377-38e3-4841-9e54-77cd6f422fa6/42495330263.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7117534f-8795-4901-8fa4-7944b396b809/how_to_remove_a_trustee_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b01be38-5977-4ebc-af25-2d774a407787/minog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d23ae55-5453-4dce-954d-1ac66153759e/how_to_train_your_dragon_2_cast_characters.pdfIn PDF document text
    • https://s3.amazonaws.com/futamo/31231909929.pdfIn PDF document text
    • https://4647adb0-9c01-46a1-aef1-4380d5873f13.filesusr.com/ugd/edb4a7_68e74713079e435196aa40dc33cf97d2.pdf?index=trueIn PDF document text
    • http://dowafirowelumex.atwebpages.com/grade_7_math_final_exam.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/83120285803.pdfIn PDF document text
    • https://189c2d36-84ff-4b81-9465-96c33c1d3b91.filesusr.com/ugd/35ddae_30ccf175b5e040a381366ff02148a65e.pdf?index=trueIn PDF document text
    • https://128fc002-9ed4-4a8f-9a6b-83b43563a9ed.filesusr.com/ugd/6812d7_f3f644665606476a8cb6328123357de6.pdf?index=trueIn 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_off0000e521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE521 5040 bytes
SHA-256: 5dfa156436b240a17b7fa860b9898c93fe0c80b53388354bfae2db4abd485c57
font_01_sfnt_off0000f64a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64A 10856 bytes
SHA-256: 9dc1cbb6cc093c6a64b03fc58fa96888ccb6382cab4c8e86dc8f821c5269327e

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