Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fe324ef1cdc4e13…

MALICIOUS

PDF

84.7 KB Created: 2021-03-28 21:17:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d995fc4d2184711e940f895fb89f8bd9 SHA-1: 26a54535aecf536622fdc920d87ad6de58d24de1 SHA-256: 5fe324ef1cdc4e1375aa882cae6fbacb51165f06330e969064e278b9bddcd0d8
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high probability of malicious intent. It contains numerous external URIs and is described as a link farm on disposable hosting, suggesting it's designed to redirect users to potentially harmful sites. The presence of embedded URLs and the nature of the heuristics point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://druttle.ru/strik?utm_term=would+you+rather+questions+funny PDF link annotation
    • http://kerefasiputupez.iblogger.org/10500913412.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • http://watogoda.mypressonline.com/english_test_beginner_100_questions.pdfIn PDF document text
    • http://grigolia-studio.ru/senixogutamadobalikaxafivti8hb.pdfIn PDF document text
    • https://cdn.sqhk.co/dufelogaruf/2jaeFhh/80824268349.pdfIn PDF document text
    • http://mbfsopg.com/dedofagetizikuguc9z.pdfIn PDF document text
    • https://kekisuganuzab.weebly.com/uploads/1/3/4/7/134721312/3d58fe68ab.pdfIn PDF document text
    • https://sofamilases.weebly.com/uploads/1/3/5/4/135401016/06675299fdff.pdfIn PDF document text
    • https://galixasuja.weebly.com/uploads/1/3/4/5/134518214/zutelifuj.pdfIn PDF document text
    • https://cdn.sqhk.co/koxuvusu/jfgcYpa/63334315840.pdfIn PDF document text
    • http://tujukesabegakom.mygamesonline.org/tapowisipamosamerukomo.pdfIn PDF document text
    • https://wenudujajavu.weebly.com/uploads/1/3/5/3/135318124/xosewada-letitutolatilo-mavogopixa.pdfIn PDF document text
    • https://molegogadamo.weebly.com/uploads/1/3/4/3/134341439/mizovuvibaxezixuruki.pdfIn PDF document text
    • http://kifenefazujiz.iblogger.org/zefopigazajepivid.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://uploads.strikinglycdn.com/files/edbfa712-063c-42a4-a823-fd344bb96c0c/56529833994.pdfIn PDF document text
    • http://gejujebiwibi.epizy.com/ruramamamaleb.pdfIn PDF document text
    • http://zulolabopel.myartsonline.com/boundary_layer_theory_by_schlichting.pdfIn PDF document text
    • http://danebusuji.onlinewebshop.net/16042988741.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37065fca-8647-45bc-828b-951f56dc584c/48297577860.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5abf13f8-7374-4f35-adc4-4fa4561068f7/blues_for_mister_charlie_act_i.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_off0000fe72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE72 5120 bytes
SHA-256: 197f98a807c97f859e5a1dd5030188c1e9ac666db5f6b9a1f47ed9a482505f4f
font_01_sfnt_off00010fde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FDE 11076 bytes
SHA-256: 2528e3f5f5561eb4582e313a8b47270bf961b9a0658db68a148c66de7f1650c0
font_02_sfnt_off0001359b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1359B 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3