Malicious PDF — malware analysis report

Static analysis result for SHA-256 15190d84151c960c…

MALICIOUS

PDF

80.1 KB Created: 2021-03-20 03:21:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 491efc13753d58926d80e2f495a73baa SHA-1: 733ddc528a7dada63e21c4157b4045ac215d2246 SHA-256: 15190d84151c960c2ef400aac2233fe99ed8f6ee49e2655a5b34264b8deadd03
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, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a likely attempt to redirect users to malicious sites. The document body, though heavily obfuscated, contains references to external URLs, reinforcing the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=how+long+does+it+take+to+make+beef+jerky+in+a+nesco+dehydrator PDF link annotation
    • https://cdn.sqhk.co/vozevadijut/2qxihhc/tuduvuxiwunijajitub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426261/normal_6030d9157253a.pdfIn PDF document text
    • http://jumbochecker.com/33813570462vn4dt.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvukidovime/Njciugi/arti_mimpi_hamil_di_luar_nikah_dan_keguguran.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425255/normal_60086ad1944db.pdfIn PDF document text
    • http://dikegebe.mygamesonline.org/escepticismo_filosofico.pdfIn PDF document text
    • http://help-service-support.com/drupal_webform_conditional_email_templatesog57d.pdfIn PDF document text
    • https://cdn.sqhk.co/vagekoxes/hdigdgf/odd_man_rush_film_review.pdfIn PDF document text
    • http://fodelogutejamit.getenjoyment.net/jeet_kune_do_classes.pdfIn PDF document text
    • http://picsonair.com/zotijisexolivatadupedarso7v.pdfIn PDF document text
    • http://zoompol.xyz/duxomakoxepuvufezahvhvm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380209/normal_602feeea37edd.pdfIn PDF document text
    • http://gejesixave.scienceontheweb.net/2013_honda_civic_maintenance_schedule.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500889/normal_5fc897874bbed.pdfIn PDF document text
    • https://cdn.sqhk.co/zepipawetopi/jighjg2/uptodate_free_for_students.pdfIn PDF document text
    • http://waxedeb.getenjoyment.net/30304960709.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450731/normal_5fe55915eecb2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dojagosixotebut.rf.gd/chapter_13_repayment_plan_form.pdfIn PDF document text
    • http://wowemipawugese.epizy.com/escala_de_alvarado_pediatria.pdfIn PDF document text
    • http://luvabokinoleg.onlinewebshop.net/38311210659.pdfIn PDF document text
    • https://a815f367-2516-4b88-9496-eed07d5c1eb7.filesusr.com/ugd/665c20_069f96937408459f8b9bb3e36e84bc5f.pdf?index=trueIn PDF document text
    • https://a4edf7fa-b057-49b5-8014-e5fd436fbef3.filesusr.com/ugd/c8b2c5_d874e8069f56406cbf06583a7e3144a8.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_off0000f57b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57B 5868 bytes
SHA-256: 24a74970de8c9c7a6e0197d2dc1b3fd33461af893107d433feba722a054f02f4
font_01_sfnt_off0001096c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1096C 11472 bytes
SHA-256: 59be2a908e71f5dad4246bfa6977bc05f49bbe6325ac3b1dd1493ef1ee39b803

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