Malicious PDF — malware analysis report

Static analysis result for SHA-256 99ac99f5b3c39c3d…

MALICIOUS

PDF

92.2 KB Created: 2021-03-16 14:22:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 95a0ceca1ff8e9c33798396938419424 SHA-1: cbd2d065465a1a78b73b88ca0056da6f6bbbd3cd SHA-256: 99ac99f5b3c39c3df750afd1cdb11d24f90a718f4cce680176f7bae8995b757b
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with heuristics indicating it's a link farm on disposable hosting. The document body, though heavily obfuscated, contains text related to 'The Hangover 2' and a URL, suggesting a lure for users to access potentially malicious content. The presence of numerous external URIs further supports this phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://druttle.ru/wix?keyword=the+hangover+2+online+free+stream PDF link annotation
    • http://manthoughtswebsite.website/hipoxia_y_asfixia_neonatal8fxsh.pdfIn PDF document text
    • http://girepodemaz.getenjoyment.net/vexipigebegesulagotimapur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494883/normal_601f0f3823c8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481270/normal_5fdb187d8461a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455639/normal_603d13a3f09e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471234/normal_60120a2406fd3.pdfIn PDF document text
    • http://megatorg.ru/xirabilujutunazevzrrz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416500/normal_601d9bbd3311c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403408/normal_604feb1f7dc11.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451021/normal_5fecd3ffd05e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496225/normal_600d71cde6305.pdfIn PDF document text
    • http://giboxibefelas.22web.org/examen_procalcitonina.pdfIn PDF document text
    • http://wisecreditscore.info/42962785515rmzy8.pdfIn PDF document text
    • http://bometaximom.scienceontheweb.net/63489857409.pdfIn PDF document text
    • http://cmb-accueil.com/nezonig4dg.pdfIn PDF document text
    • http://rujajabejeveto.66ghz.com/metformin_weight_loss_antipsychotics.pdfIn PDF document text
    • http://sanatoriy-izumrudny.ru/83177943450f6w3e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458616/normal_5fd04f29890b0.pdfIn PDF document text
    • http://zutolewe.mywebcommunity.org/beats_studio_1_wired_red.pdfIn PDF document text
    • http://tekupugu.sportsontheweb.net/bucket_filler_activities.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458826/normal_5fc9e8b2b7d6e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jumepenitujox.atwebpages.com/example_of_reaction_paper_in_apa_format.pdfIn PDF document text
    • http://sekizipax.rf.gd/metexunujelebeb.pdfIn PDF document text
    • http://paruwegugu.rf.gd/36917255974.pdfIn PDF document text
    • http://devepovamijube.epizy.com/48578529388.pdfIn PDF document text
    • http://xogebaf.rf.gd/craftsman_25cc_weed_wacker_parts_diagram.pdfIn PDF document text
    • http://mukavazoxa.epizy.com/77776236789.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_off00012baa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BAA 5324 bytes
SHA-256: 0a742cb27f2e97ddde7b09a75ac9ef01e48b5d61182c0baf66cf20377dc17c23
font_01_sfnt_off00013da7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DA7 11028 bytes
SHA-256: 2e187d0a2c426f74eb4079fbc7c4798788ec9d1cecfb7510bad98b156789f138

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