Malicious PDF — malware analysis report

Static analysis result for SHA-256 06e60075e334132a…

MALICIOUS

PDF

75.2 KB Created: 2021-03-23 21:46:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ffd4886af93e69c85dfa608ff142edd3 SHA-1: c71493a52716ee5ce4d6d597aa8723a6c247fd4c SHA-256: 06e60075e334132ab65642b896a151dd2af8ca97bf4622b2cd9a61506a0e1e3b
186 Risk Score

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 0.9997

Heuristics 6

  • 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.
  • 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://jacksth.ru/strik?utm_term=e46+transmission+fluid PDF link annotation
    • http://poruzotosiku.getenjoyment.net/anyong_tubig_sa_asya.pdfIn PDF document text
    • https://tesiligozi.weebly.com/uploads/1/3/1/4/131407846/9aaef0b7a7168.pdfIn PDF document text
    • http://gosoxegekiri.mywebcommunity.org/57253693784.pdfIn PDF document text
    • http://jeruxawi.iblogger.org/23156751081.pdfIn PDF document text
    • http://gejopuzebizovuk.iblogger.org/vukijelemawuxekikimipa.pdfIn PDF document text
    • https://bumiwawewa.weebly.com/uploads/1/3/5/3/135343946/d6da71c239c7e5d.pdfIn PDF document text
    • https://bewapuvin.weebly.com/uploads/1/3/1/4/131453684/soropurodimagedo.pdfIn PDF document text
    • https://mokoluwi.weebly.com/uploads/1/3/4/5/134595511/wixoneputikisuv-rezuziwojipa-bawirofa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://87c8fc71-818b-4167-bf0d-2ac3bc49ffd1.filesusr.com/ugd/f9d4cd_d41e0c580856493180338f8fb27fffac.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/17fa6810-22ba-48a4-b614-de376d34e4e6/what_are_the_books_of_the_new_testament_in_order.pdfIn PDF document text
    • https://b913155d-2712-4fd4-bcc6-651970a8c456.filesusr.com/ugd/e39924_1c9f10fee5924be1ac6be6a73b0e3616.pdf?index=trueIn PDF document text
    • https://011f98f8-b45f-4578-a2fd-466b530f7845.filesusr.com/ugd/74e905_4d20622dfc4d47ae9de304eb1fddf9a6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/00154f33-4f4d-4ef3-a359-a719b17bb4e4/weller_8200n_soldering_gun_tips.pdfIn PDF document text
    • https://29c5b005-6627-40e3-9da1-9f9d3dbc34dc.filesusr.com/ugd/7ad284_345f96eccd0d436396223752d328e360.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/44763bde-5682-47c6-b41a-38ab3c7e5b30/ninovosuzovexu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c81f009-d04f-484e-8100-0c458acc7f9a/super_mario_bros_2_nes_game_download.pdfIn PDF document text
    • http://bidilud.rf.gd/terraform_aws_elb_listener_certificate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e461477-bfcc-4b12-986e-00cca637256c/is_christian_healthcare_ministries_legitimate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df94a83f-e621-45b4-98ee-57b1ed9c87ca/zilazunivabodizinune.pdfIn PDF document text
    • http://limoxukuk.atwebpages.com/febezekawepamaguxatus.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDCB 5016 bytes
SHA-256: 07a1302c489d0797de0868db8b72115e9507e0b938c7e5e13cb9ee1ee721d6c4
font_01_sfnt_off0000eeb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB2 10212 bytes
SHA-256: 18e57444a838dd0858fc4ac6107bf5f42177b75cb15c1c28ea0dce5330e6cc72
font_02_sfnt_off000111c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111C7 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3