Malicious PDF — malware analysis report

Static analysis result for SHA-256 aabe99192c698b74…

MALICIOUS

PDF

96.3 KB Created: 2021-03-24 08:57:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: ceb36336db5da3390e14f72ff46d4f1f SHA-1: b09d9a04405612774f9d0f38352a0f2dd056b3e5 SHA-256: aabe99192c698b7432e311723c3bd34420cffaf4f34ae2bd24849655cc0924d9
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a high concentration on disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were extracted, the PDF structure and URL patterns are indicative of a malicious lure.

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://botokaw.ru/award?keyword=bwv+1007+violin+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4405654/normal_605948c41e029.pdfIn PDF document text
    • http://shtampshop.ru/6106685259b2pc2.pdfIn PDF document text
    • https://cdn.sqhk.co/jexerigix/2igagi6/tomb_raider_dreamcast_games.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477635/normal_6057eaebe5237.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370528/normal_604d945115ed6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463275/normal_6043408e9bb22.pdfIn PDF document text
    • http://begdas.fun/49101418931bmou8.pdfIn PDF document text
    • https://cdn.sqhk.co/datujisukebe/gieErgd/disney_subscription_cost_philippines.pdfIn PDF document text
    • https://cdn.sqhk.co/bulegumu/ibWNheo/runizajog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414335/normal_601878f889e5c.pdfIn PDF document text
    • http://moneymaya.site/13715935070ectrb.pdfIn PDF document text
    • http://anarchymedya.com/dental_material_phillipskpk9p.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ef9d90ca-5811-4a1c-810e-75bcfae60121.filesusr.com/ugd/a33af7_c9bc17fddb2c472ea184c7040637af25.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/vawabumomokoxaf.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/arturia_minilab_ableton_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a96411a-d8af-44ea-998e-7c88afff6e7a/the_decision_book_mikael_krogerus_download_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90bccfb8-d170-4845-8ac7-812f75ba8a58/posing_guide_for_male_models.pdfIn PDF document text
    • https://0cfe495c-9a5f-46a1-a5f3-fb21b6211bac.filesusr.com/ugd/7aabb2_f5fa38e6e90c4a778a61a843e92b23db.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9b3711f-ed55-4978-a826-0400080c5f0f/pozogemaxe.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/lazanivifobimirugazuzejad.pdfIn PDF document text
    • https://cc4f1b1a-08c7-467e-bb5a-e3073ad8caf1.filesusr.com/ugd/ffc175_ba8c95069bc64ef0b0c05fee965cf700.pdf?index=trueIn 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_off0001375b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1375B 5024 bytes
SHA-256: 7f6e8c15ce3bb1e156493cd9365bb56d18fc8248b8cd37661b9b5bcae2852a26
font_01_sfnt_off000148bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148BB 13172 bytes
SHA-256: a72e8af0dbfb0dfdfa2c50a65256d0ab3ab6cb4f86ac0e2d0215e00835206a06

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