Malicious PDF — malware analysis report

Static analysis result for SHA-256 05e21a5108c8afc9…

MALICIOUS

PDF

76.9 KB Created: 2021-03-17 14:19:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: aebb8dbf9839dd96fc4545bcbd5e01f0 SHA-1: 56589b7b4e5146e284c108c36a103131d7483574 SHA-256: 05e21a5108c8afc9ee325f22a42314d36552eaad47b7757ada327406bdff338b
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 0.9998

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 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://vilenefex.ru/wix?keyword=4th+and+goal+unblocked+games+88 PDF link annotation
    • https://kolijegidixut.weebly.com/uploads/1/3/1/3/131379325/fezulaguz.pdfIn PDF document text
    • https://budorezaru.weebly.com/uploads/1/3/4/8/134859022/fofufujusetexakeweb.pdfIn PDF document text
    • https://pigukoziluluz.weebly.com/uploads/1/3/4/8/134896600/raroxikivuzivagiwib.pdfIn PDF document text
    • https://falufanimuv.weebly.com/uploads/1/3/4/3/134377488/cde6a42104.pdfIn PDF document text
    • https://jizetexosobuwek.weebly.com/uploads/1/3/0/7/130740437/kawotezifofeledila.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/39e2edf8-5d34-4bb1-9a26-927047d5db38/25858597860.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0359587-4a80-415a-9994-a4475919c9fe/72528919929.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65455d38-ee72-4a66-bef8-16eaef997ad1/71868668808.pdfIn PDF document text
    • https://s3.amazonaws.com/lawakux/what_to_do_when_your_tcl_roku_tv_wont_turn_on.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f00a8c9a-ec08-420a-84bd-d16185a954c3/journey_to_the_center_of_the_earth_2_full_movie_in_tamil_download_isaimini.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc03677f-dd7a-491a-b676-191a604a61db/rufitadisubanelilaleped.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/47945098068.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2eb00bd9-6b31-46f3-882f-fd311b631080/phonics_assessment_for_2nd_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/metabolismo_de_las_grasas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/252a294c-d7a1-41d1-b740-f935944d97e2/will_there_be_a_fifth_book_in_the_inheritance_cycle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd2b1064-365f-4731-9644-83412e6f6186/dream_meaning_of_seeing_apple_pie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01ad4853-b8df-439b-a157-5c96c8a2b492/23015051664.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4cb2014-366b-494e-9239-676854d4e27d/clasificacion_de_los_numeros_irracionales_y_ejemplos.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_off0000eac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC1 5648 bytes
SHA-256: eed76b165d893a121b8f49232bf1d940b8f547b907b1e40e0bfb2ad55ee123cb
font_01_sfnt_off0000fdd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD5 12224 bytes
SHA-256: 3324c85955d3d9e3bee3fb37a99f7262ac0cc1e88b159926e23334233f463e73

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