Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9b5e461bdd9d45a…

MALICIOUS

PDF

40.7 KB Created: 2020-11-09 08:07:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 45df88d52d786e0b8c95f4ad3cff955b SHA-1: 65353b6b9865f5087ed101a207ffa36fdf7010af SHA-256: b9b5e461bdd9d45a1436c122fc65930ee0fa7f961222d4502f5ddf0b66b3f95d
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffking.ru/aws?keyword=1337x+proxy+1 In PDF document text
    • https://tapuroxoj.weebly.com/uploads/1/3/4/5/134599682/780642.pdfIn PDF document text
    • https://mojenosude.weebly.com/uploads/1/3/1/3/131382274/sukapubuniliwit-jizimeputimipa-kapabem.pdfIn PDF document text
    • https://tobuzedatenet.weebly.com/uploads/1/3/4/3/134322281/safubisar.pdfIn PDF document text
    • https://vuzevarezevarot.weebly.com/uploads/1/3/0/7/130740461/tekisaju.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://jokusasuf.files.wordpress.com/2020/11/coulombic_attraction_pogil_answers.pdfIn PDF document text
    • https://fojewuxekaku.files.wordpress.com/2020/11/vokabawuvurirarataxupor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4274c96e-1b74-4650-a912-46de2c4f1f2a/pamapejatosazal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93efc31a-fec4-485e-8ea7-97677b508a97/zaxirefibukaduzewavuj.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/nikumobotenibagu.pdfIn PDF document text
    • https://wavowemokole.files.wordpress.com/2020/11/pebopamoligapuwox.pdfIn PDF document text
    • https://metibuvup.files.wordpress.com/2020/11/soviketuxalepejokeror.pdfIn PDF document text
    • https://kasujakomo.files.wordpress.com/2020/11/8671079407.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19691b19-4d83-42ea-aab6-c6313c5c0396/rolixenuzes.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_off000061e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61E1 4764 bytes
SHA-256: 7a4e7c63334c85428c72f8c28f3752c4b4be7d5f2b579d27cce3e33cd1ea83fd
font_01_sfnt_off00007249.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7249 10460 bytes
SHA-256: 9931fc364bd26f266f593cbeef1cd478cf04385d9d4878fc1a4ecb8515e10262