Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a21f27603171fd2…

MALICIOUS

PDF

51.6 KB Created: 2020-11-08 23:59:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: b2b0e560cc4d98ca8d8e5d44ba5e57d5 SHA-1: 40995810a138fb9ca78fc3a9ad821cbf803e7019 SHA-256: 9a21f27603171fd2a74a424b3a1d31bf0a5cdc603a987b2692155b33275a9914
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://trafficel.ru/aws?keyword=peshawar+nights+pdf PDF link annotation
    • https://wajiresejepo.weebly.com/uploads/1/3/0/7/130774962/3b0aae.pdfIn PDF document text
    • https://xoraxabaxid.weebly.com/uploads/1/3/2/6/132682630/wasaxifaboguga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369922/normal_5f9acacc1995d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://likuzow.files.wordpress.com/2020/11/40264502684.pdfIn PDF document text
    • https://waragifogeva.files.wordpress.com/2020/11/piano_jazz_licks.pdfIn PDF document text
    • https://mekiperefef.files.wordpress.com/2020/11/crossover_symmetry_iron_scap_workout_chart.pdfIn PDF document text
    • https://xudunirefur.files.wordpress.com/2020/11/foxconn_h61mxv_v2.0_manual.pdfIn PDF document text
    • https://gorujugiximu.files.wordpress.com/2020/11/karipevo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e24c0cbf-02a8-4552-8d89-763593e42331/lsat_study_guide.pdfIn PDF document text
    • https://nosajal.files.wordpress.com/2020/11/apptoko_minecraft_versi_terbaru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41f1c1d3-cbd3-42ef-8af0-c19fe0a4c26e/wapugigowabituguvinix.pdfIn PDF document text
    • https://nuvinifiraf.files.wordpress.com/2020/11/51145006648.pdfIn PDF document text
    • https://tevarew.files.wordpress.com/2020/11/88608638079.pdfIn PDF document text
    • https://pupirod.files.wordpress.com/2020/11/nozemapopumetuve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27b32d26-1b25-4714-ae05-cd425e1e9e0b/neser.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000a21c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA21C 19196 bytes
SHA-256: a4ebb5eb3da76b358b52199fe2aa45b459d1ab095c64eb594739b6d10bb60a6f
font_00_sfnt_off000068ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68EF 5364 bytes
SHA-256: d93403b40ee87002dd9407389abd90bcb8f7711b0553789fb0acc513ca35611e
font_01_sfnt_off00007b40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B40 11800 bytes
SHA-256: 48f834c5e519096aca359b443db947ed8f52d34ee24c209b0f5ef778e4d693f4