Malicious PDF — malware analysis report

Static analysis result for SHA-256 86e6bf258a3a9a65…

MALICIOUS

PDF

65.5 KB Created: 2021-01-28 13:40:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: c1095d63e2845271fe23867146cb36f7 SHA-1: b88cacfe0889acada174627951e8fc95d87e014d SHA-256: 86e6bf258a3a9a6526f558c8702fbad6124b5ab9e7d79383c65671f8ca996a3c
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files, suggesting a link farm for SEO or phishing purposes. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as Pdf.Phishing.Trojan. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/123?utm_term=filmmakers+handbook+steven+ascher+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4453342/normal_5fd9de617163f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420018/normal_5fe30d5161875.pdfIn PDF document text
    • https://cdn.sqhk.co/vudararemane/dijcSif/tutidodagonavezunu.pdfIn PDF document text
    • https://gogodelile.weebly.com/uploads/1/3/0/9/130969080/nedunobuvugejukewota.pdfIn PDF document text
    • http://kogefidol.iblogger.org/bacterial_artificial_chromosome_vector.pdfIn PDF document text
    • https://cdn.sqhk.co/wogokodu/hhc8Ggh/tedupopowa.pdfIn PDF document text
    • https://kepegefamoza.weebly.com/uploads/1/3/1/3/131398453/wefuz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403804/normal_6005d7ca6f4fb.pdfIn PDF document text
    • https://cdn.sqhk.co/letaziseb/aggfpJh/porsche_racing_experience_los_angeles.pdfIn PDF document text
    • http://bepibolet.22web.org/certificate_of_analysis_template_food.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486206/normal_5ffb343e570f4.pdfIn PDF document text
    • https://cdn.sqhk.co/nezazexador/ljdkLgh/28_days_later_rage_scene.pdfIn PDF document text
    • https://cdn.sqhk.co/xaranoraf/Ys6ghhi/alone_quotes_in_english_for_girl_share_chat.pdfIn PDF document text
    • http://loletopuwiv.iblogger.org/pnc_ira_beneficiary_designation_form.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/mukut/matric_admission_form_aiou_2018.pdfIn PDF document text
    • http://mefuxunopurojim.rf.gd/quarterly_calendar_template_2019_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/cg_police_def_exam_model_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/sstp_vpn_client_android.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/havering_sixth_form_term_dates_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/khandeshi_ahirani_dj_song.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/kulekutijulupobusudaz.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_off0000c5bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5BC 5612 bytes
SHA-256: 6bce894e1ff97b1475fa338e3f307f14b7295473c5a1aa1eccf86556d994db2d
font_01_sfnt_off0000d8a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A6 9228 bytes
SHA-256: 122ef1a584af997808799f78b5239804c3f088b019232643798eb53e9f02e3ac

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