Malicious PDF — malware analysis report

Static analysis result for SHA-256 298ba73bb856739a…

MALICIOUS

PDF

79.3 KB Created: 2021-03-07 16:28:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 45089295f866fec42cf94b94f071d27c SHA-1: 586b0aa7242f496c5017fe29f226e1b7f78da460 SHA-256: 298ba73bb856739ac6148c60adbb08ac421c9341873f58cb044677e980bdcb28
244 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to disposable hosting services and redirector infrastructure. The heuristic firings indicate that this PDF is part of a link farm designed to direct users to malicious sites, such as the one found at `https://dafemum.ru/wix?keyword=95+jeep+grand+cherokee+laredo+fuse+box+location`. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://dafemum.ru/wix?keyword=95+jeep+grand+cherokee+laredo+fuse+box+location In PDF document text
    • https://zojegidaluvimov.weebly.com/uploads/1/3/4/1/134109086/8d4fb9.pdfIn PDF document text
    • http://dabopoxele.getenjoyment.net/39573339878.pdfIn PDF document text
    • https://welavomuwaj.weebly.com/uploads/1/3/4/6/134633166/b034da.pdfIn PDF document text
    • https://lojexidipiwakif.weebly.com/uploads/1/3/4/0/134041559/5462713.pdfIn PDF document text
    • https://vunidiripoga.weebly.com/uploads/1/3/1/4/131453449/fuzusel.pdfIn PDF document text
    • https://vurusewotuludi.weebly.com/uploads/1/3/0/7/130739344/kofokigip-kewogajuwida-tejilar-kedawimisiteg.pdfIn PDF document text
    • https://baxezakeva.weebly.com/uploads/1/3/1/4/131406046/2181972.pdfIn PDF document text
    • http://pixunune.sportsontheweb.net/xoxeb.pdfIn PDF document text
    • https://fokinovev.weebly.com/uploads/1/3/0/7/130775288/wufali-bupejadep-govabezak-wibugonobagil.pdfIn PDF document text
    • https://fosozenasavo.weebly.com/uploads/1/3/4/8/134889966/3346298.pdfIn PDF document text
    • http://tanolugulutewu.medianewsonline.com/fufajat.pdfIn PDF document text
    • http://lirinevewafa.mypressonline.com/dosozigasilarivonatumu.pdfIn PDF document text
    • http://xuwuvewisin.mypressonline.com/telalituvewavosumusetape.pdfIn PDF document text
    • http://pobesegu.scienceontheweb.net/45558227265.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
    • http://jorasixu.myartsonline.com/presonus_studiolive_32.4.2ai_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4582d7d6-0492-4757-900b-8d71370547f6/45281389210.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/mugijiguvikifefapurewuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b652b2e-2a39-461f-b3e6-1bc9fbb24505/wegunibewanukepokivinuxa.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/81685943451.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9439898a-ea3a-4633-9c5a-169ac0fe2cc4/giparegekirivowofesupakot.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_off0000ddf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF5 5832 bytes
SHA-256: 26e91dba91d3bb028bca124c68149500b8c22c4f897f2daac40644b78fa25406
font_01_sfnt_off0000f1c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C0 14544 bytes
SHA-256: f789b94b29ede7f42a1a459d7f8cc5287583d295745e09190c4c734c64567a0c
font_02_sfnt_off00011f47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F47 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71