Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4e8f499afea70b8…

MALICIOUS

PDF

75.5 KB Created: 2021-03-13 16:09:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 8adcb6689199966fb52fc6bb5cefb5de SHA-1: 7a9887b4613ea594697561c2e06f0ed26adebac9 SHA-256: d4e8f499afea70b80d7afcb5ada3ff87920820d0969a39d01fc6e375b24b7cec
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting it is part of an SEO spam or link farm operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the PDF structure itself is used to host and redirect to numerous external URLs.

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
  • 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.
  • 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://botokaw.ru/wix?keyword=samsung+galaxy+j2+shine+specs PDF link annotation
    • https://biwusegunaji.weebly.com/uploads/1/3/4/0/134096831/sibefejedeso_logigolojo_kemiti.pdfIn PDF document text
    • https://cdn.sqhk.co/wekababu/TggYigl/bein_sports_channel_cox.pdfIn PDF document text
    • https://nuzukozifazo.weebly.com/uploads/1/3/2/6/132682871/lerez.pdfIn PDF document text
    • https://vuwezamubom.weebly.com/uploads/1/3/0/8/130814902/zezuzufev.pdfIn PDF document text
    • https://cdn.sqhk.co/kumipexa/e5Cjcgc/orbia_tap_and_relax_apk.pdfIn PDF document text
    • https://femobideja.weebly.com/uploads/1/3/4/7/134735935/9174182.pdfIn PDF document text
    • http://sneakerspapa.store/philips_voice_tracer_dvt2510_volume_control3dh5c.pdfIn PDF document text
    • http://proflist-kursk.ru/codex_craftworlds_8th_edition_download0hzq2.pdfIn PDF document text
    • http://circulyarkadigital.xyz/shadow_and_bone_book_seriesrkyx4.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/dikobepibelun/fumediremelalizilogivolu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9ff3b50-a720-4863-b986-3b3e3b67e0bb/66620478638.pdfIn PDF document text
    • http://xedaxabefax.rf.gd/software_implementation_communication_plan_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e798303-3c37-425a-8a71-21372942756b/48036694687.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/96891483099.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/probability_exercises_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f148e8cc-58aa-4e02-ade5-bf9211c8c238/vivofit_jr_2_bands_target.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c83d9a5e-51fd-466f-b462-e7d5b674d57e/75394137814.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65aca5c7-11ff-4dda-9260-0b4608d459a3/55758701456.pdfIn PDF document text
    • http://zapudeni.epizy.com/ashes_cricket_game_apkpure.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_off0000e979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE979 5732 bytes
SHA-256: e20e93d1963406e2a5d8017d98b7f8e28d163766d0cc2d0f8bca9f8c2c53a8b0
font_01_sfnt_off0000fcf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF7 10560 bytes
SHA-256: f6478f804d5a4910bc1996b59f35e069886b1647e239589b859c9b1e11af4cb7

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