Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9deed5e54c5b0d0…

MALICIOUS

PDF

80.0 KB Created: 2021-03-13 14:29:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b46be265a96d2ab69fa3a1de299743a2 SHA-1: e7b86ede894a90749a700729099b05a0635655e3 SHA-256: d9deed5e54c5b0d09b191f0183f383cec9988779ac008aa7724918f6ebe70ce3
156 Risk Score

Malware Insights

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

The sample was identified as malicious by multiple heuristics, including ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, suggesting a link farm or phishing attempt. While no scripts were explicitly extracted, the PDF structure and the presence of external URIs point towards an attempt to redirect the user to malicious sites, likely for further payload delivery or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/award?keyword=ampicillin+davis+pdf PDF link annotation
    • https://wanujonoguj.weebly.com/uploads/1/3/1/6/131607110/pexiwidij-zawamexufav-vafikasuwul.pdfIn PDF document text
    • https://lutaxebibutemun.weebly.com/uploads/1/3/1/3/131380730/48bb0788dbcc.pdfIn PDF document text
    • http://miribut.mywebcommunity.org/premiere_pro_cc_2020_keyboard_shortcuts_download.pdfIn PDF document text
    • http://auto-agents.space/34291055453eufyx.pdfIn PDF document text
    • https://fivarebaxuru.weebly.com/uploads/1/3/5/3/135326201/b6fe234d6.pdfIn PDF document text
    • https://cdn.sqhk.co/vatukaso/bjbSPaJ/free_likes_and_views_on_tiktok.pdfIn PDF document text
    • http://wonder-ita.space/california_real_estate_practice_examre7h9.pdfIn PDF document text
    • https://cdn.sqhk.co/woselukafo/b6hajcy/affirm_login_issues.pdfIn PDF document text
    • https://vumetubav.weebly.com/uploads/1/3/0/7/130776444/nuguxuvaxusowijudex.pdfIn PDF document text
    • https://cdn.sqhk.co/teposodigar/gjXidjh/rubber_chicken_comics.pdfIn PDF document text
    • http://ecosbor.net/63492865845awcg1.pdfIn PDF document text
    • https://cdn.sqhk.co/mugegiduveb/jeqVjj3/12065831059.pdfIn PDF document text
    • https://cdn.sqhk.co/nobixapo/bjiaWxl/82067490840.pdfIn PDF document text
    • https://belinadojo.weebly.com/uploads/1/3/1/6/131607131/kowamalezaleni_zapalima_ripada.pdfIn PDF document text
    • http://tomokatixo.mygamesonline.org/guxazitiganepa.pdfIn PDF document text
    • https://leludexubivavij.weebly.com/uploads/1/3/1/8/131860378/3b62c.pdfIn PDF document text
    • https://gepadera.weebly.com/uploads/1/3/0/7/130740344/3623841.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/tamovagag/nogumixarode.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/rajezowozukezabojato.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/19636547670.pdfIn PDF document text
    • http://duziroro.myartsonline.com/78680022497.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/xiwalij.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_off0000fd06.bin
87362b75519d3dd5abb5c4d8f7a3c3a5a48c57336ac0cc0d782439d211c8c0ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD06 5252 bytes
font_01_sfnt_off00010edc.bin
c7dbaf2e2a6366d2dc07a3b50e33c8b5020c9ac3ce0cf97b251a1b833353872d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EDC 10580 bytes

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