Malicious PDF — malware analysis report

Static analysis result for SHA-256 cda98399c1433805…

MALICIOUS

PDF

79.0 KB Created: 2021-04-19 23:28:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: efee42679e41db9065007d549f8ba5fe SHA-1: 6425621819d8e29c9576ff895d93d56109758ad5 SHA-256: cda98399c1433805b008015bfa595d0864caa073f054eef8dcdb1ce5692fe6ce
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URIs point towards an attack pattern involving directing users to potentially malicious external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 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.
  • 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://ponafet.ru/strik?utm_term=death+or+glory+regiment PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4486983/normal_6057a65299b07.pdfIn PDF document text
    • http://galabogenezoso.getenjoyment.net/3435202051.pdfIn PDF document text
    • https://cdn.sqhk.co/limizolaxa/OGjhGjb/66740383380.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413563/normal_5fcf9505b43c3.pdfIn PDF document text
    • https://ladipepisosixas.weebly.com/uploads/1/3/4/8/134898905/menezasexu.pdfIn PDF document text
    • https://cdn.sqhk.co/winogolelog/Jghchj4/gurom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475866/normal_604cf41f39d54.pdfIn PDF document text
    • https://zipobirin.weebly.com/uploads/1/3/5/3/135386694/ecfa74d73409.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387713/normal_5fe489326de56.pdfIn PDF document text
    • https://cdn.sqhk.co/soleximu/YjdoZrM/barcarolle_op_37_no_6_tchaikovsky.pdfIn PDF document text
    • https://baxorumele.weebly.com/uploads/1/3/0/9/130969728/ef3cc4265eaa184.pdfIn PDF document text
    • http://virivuluk.getenjoyment.net/data_structures_and_algorithms_basic_concepts.pdfIn PDF document text
    • https://cdn.sqhk.co/totarujined/hVhahfl/72422834843.pdfIn PDF document text
    • https://pukokisawar.weebly.com/uploads/1/3/4/7/134749025/b0445d0258e68a2.pdfIn PDF document text
    • http://fesotisifofil.mygamesonline.org/veguxopofetukosit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/cartoon_photo_video.pdfIn PDF document text
    • https://s3.amazonaws.com/kotidox/37564225376.pdfIn PDF document text
    • http://vidugozu.atwebpages.com/how_to_identify_informal_fallacies.pdfIn PDF document text
    • https://s3.amazonaws.com/nojemi/devilanazawemejo.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/21370406643.pdfIn PDF document text
    • http://fixiwajavonuti.atwebpages.com/amadeus_manual_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/jevuxinuvudogezu.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/1001_songs_to_listen_to_before_you_die_list.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/free_ancient_civilizations_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/beats_studio_pro_wireless_in_ear_headphones_wireless_bluetooth_earphones_with_charging_case.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_off0000f72d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF72D 5020 bytes
SHA-256: 5ca4da5e88ab56b4b64d35032ea0875af03fb792abf4bb4f720bc5ea29c0be00
font_01_sfnt_off00010827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10827 11176 bytes
SHA-256: 5242c8a8e4a3e843021fc6a33c701db8f862b7f9a8a55e4808631acc0bd20139

Open this report in the interactive analyzer, or submit your own file for analysis.