Malicious PDF — malware analysis report

Static analysis result for SHA-256 532ba056a25770af…

MALICIOUS

PDF

81.4 KB Created: 2021-03-26 06:10:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: bf29e2682dd2e3786a7a08861195681f SHA-1: da7ad34ca671dd8fd2b63bf0b932c24e2b76021d SHA-256: 532ba056a25770af3cb6b3146b6e4b889c156bf8821728dff3ab50762f9eee15
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The primary URL, 'https://xezojetit.ru/123?utm_term=backstab+full+game+apk', indicates a lure to download a game. The ML classifier and ClamAV detection strongly support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xezojetit.ru/123?utm_term=backstab+full+game+apk PDF link annotation
    • https://fupesatufijipaf.weebly.com/uploads/1/3/2/7/132740914/2886957.pdfIn PDF document text
    • http://supobesopo.mygamesonline.org/categorical_syllogism_venn_diagram_examples.pdfIn PDF document text
    • http://rollernefrit.xyz/4676632927nvvon.pdfIn PDF document text
    • http://trokot-new.online/jikojefokae45.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374021/normal_5fe43f2609f6b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474223/normal_5fec0b4982466.pdfIn PDF document text
    • https://ginabedo.weebly.com/uploads/1/3/4/0/134017532/kunupi-ramumizu.pdfIn PDF document text
    • http://negedibomul.sportsontheweb.net/farisevemuguwesalubizu.pdfIn PDF document text
    • https://foxuginatumusex.weebly.com/uploads/1/3/0/7/130775376/60de2045.pdfIn PDF document text
    • https://xexiwimelogodit.weebly.com/uploads/1/3/4/5/134593193/ed06076aea589c.pdfIn PDF document text
    • http://reduslim-ordina.site/philips_universal_remote_codes_for_sanyo_dvd_playerijzkd.pdfIn PDF document text
    • http://budokudepa.scienceontheweb.net/jemuruxape.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://1de4b56a-3309-4767-83a2-f1bb1ea7c594.filesusr.com/ugd/a6e5e9_dbf43ccc5cbc4ecebf8263f8a857d821.pdf?index=trueIn PDF document text
    • https://f6ce3cfb-f922-470c-9e0e-eaf724001b0e.filesusr.com/ugd/defcb2_0491feecc6fa414d9dc8737c3be0dc2a.pdf?index=trueIn PDF document text
    • https://47a25507-5c4f-4e73-9b7c-0c49514c8174.filesusr.com/ugd/e00bd3_8890e55424704a57ba8ac251bac57005.pdf?index=trueIn PDF document text
    • https://6bfd3344-23d3-4e03-ab7d-00c1c23eecf6.filesusr.com/ugd/be19e1_29447e4984ca4e4a9b12aef0a275d800.pdf?index=trueIn PDF document text
    • https://ed8bc375-cd54-49ab-9ddb-988cb5b2fc3d.filesusr.com/ugd/3f3824_0d359c580dc346c282fd266aed46082d.pdf?index=trueIn PDF document text
    • https://0ed7c29b-d5f2-4290-8b47-add6aa38300d.filesusr.com/ugd/32a223_72a3ae2010724464af37dc779e3638fb.pdf?index=trueIn PDF document text
    • https://ed0f7819-48b4-4c0d-9119-93de03d81b9c.filesusr.com/ugd/e481ce_7840a13aefc64a28b286ebb9a1c2b6e2.pdf?index=trueIn PDF document text
    • http://xolevusafo.myartsonline.com/bestiariusz_sowiaski_2_chomikuj.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_off0000f405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF405 5112 bytes
SHA-256: 08afa323a8a26fb017dc683bcab1ad89ff836f0791b4e3ae8bf73470de54fbfe
font_01_sfnt_off00010582.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10582 10828 bytes
SHA-256: 7b0fa96291985b6e6654fbdd1c43166be4e1c2c8565cab0bc5bd835650458ddb
font_02_sfnt_off00012a37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A37 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2