Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eb209a6396e897b…

MALICIOUS

PDF

73.6 KB Created: 2021-03-07 15:23:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b8180e7420719edfa3a7eaf166bb4f80 SHA-1: a397120f80c5865aaab31673a708c165894607b7 SHA-256: 4eb209a6396e897bc02aa59ef153461e16990aa157ccddb2dcefae4b944592d3
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, with heuristics indicating it functions as a link farm. It contains numerous external URIs pointing to various domains, suggesting an attempt to redirect users to potentially harmful content. The presence of embedded URLs and the overall structure strongly suggest a phishing or malware distribution campaign.

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 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://xajibur.ru/wix?keyword=741+area+code+uk PDF link annotation
    • http://xolokukifimiv.sportsontheweb.net/13787876857.pdfIn PDF document text
    • http://netekepipavosis.sportsontheweb.net/brother_lx2500_bobbin_size.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418968/normal_5ff03b0764258.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475741/normal_6020549c1efe2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379034/normal_600195ff3133b.pdfIn PDF document text
    • https://zakikubefetopu.weebly.com/uploads/1/3/2/6/132696201/6982443.pdfIn PDF document text
    • https://bizonununifewe.weebly.com/uploads/1/3/4/7/134773553/zefomizupuserem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379959/normal_600f470c1d177.pdfIn PDF document text
    • https://befukifesili.weebly.com/uploads/1/3/1/4/131453358/ladame-xegisupigudesim-bodojebivafoluj-kaboluna.pdfIn PDF document text
    • https://bafuzonexive.weebly.com/uploads/1/3/0/7/130739369/xajusuri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483610/normal_6022cf8983605.pdfIn PDF document text
    • https://pasezarovatif.weebly.com/uploads/1/3/4/8/134858127/bipajugana_xepunam.pdfIn PDF document text
    • https://roboxojepuz.weebly.com/uploads/1/3/4/2/134235986/tadasovexujov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453551/normal_60339904205a5.pdfIn PDF document text
    • http://sujabupinoda.scienceontheweb.net/tigijog.pdfIn PDF document text
    • https://xomunulozesini.weebly.com/uploads/1/3/4/0/134018183/7526bb1f03.pdfIn PDF document text
    • http://favodokoleti.mypressonline.com/bukojimaxuvumumelezu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414175/normal_5ff8d6e93960b.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/tuletivotarupu/angularjs_find_element_in_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/zijawidufafobuganune.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/winrar_full_version_free_for_pc.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_off0000e49d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE49D 4912 bytes
SHA-256: 11900bf3d98629c375ef718f0dace2cd499fdc472a8e906ef626be6c7b77596f
font_01_sfnt_off0000f573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF573 10492 bytes
SHA-256: 446d0838a63015f4b9bf9d168e8a74566f41c38018063c1e35d24392c0839cbe

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