Malicious PDF — malware analysis report

Static analysis result for SHA-256 1499cabcb97b6791…

MALICIOUS

PDF

75.7 KB Created: 2021-03-01 20:04:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 384fb3370be2f9c6c33d0a0d5e08da17 SHA-1: b10bcb76e5488558b1066ba6bccfa61ad6f116b6 SHA-256: 1499cabcb97b6791f31c8682d3895f65a7d3edf70745ec422a3a1557b97b1f71
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are characteristic of lures designed to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://dugedepap.ru/123?utm_term=old+yeller+book+sparknotes PDF link annotation
    • https://cdn.sqhk.co/pigajifaw/fG9bLDF/slifer_the_sky_dragon_price.pdfIn PDF document text
    • https://cdn.sqhk.co/wenewojufaj/fhbgghi/97996477501.pdfIn PDF document text
    • http://strongcreditscore.info/savigowevupoturinetotovuvq243.pdfIn PDF document text
    • http://bibuzikufaje.mygamesonline.org/what_is_setting_the_right_price.pdfIn PDF document text
    • https://cdn.sqhk.co/karadirimose/qBojiid/mefaxunixijadasogit.pdfIn PDF document text
    • http://cardioactiveitalia.site/zidalerexanazul7k37.pdfIn PDF document text
    • https://cdn.sqhk.co/sexuzoropa/ajiSpjb/nunetomu.pdfIn PDF document text
    • http://supermagazforsale1.xyz/fluke_network_intellitone_pro_200_probelnpo2.pdfIn PDF document text
    • http://mefizilexofe.66ghz.com/ishq_barse_boondan_song.pdfIn PDF document text
    • http://gapilojazixo.getenjoyment.net/what_is_lean_six_sigma.pdfIn PDF document text
    • http://thehensleys.org/wuriwulovump5zgx.pdfIn PDF document text
    • http://vashe-zdorovie.xyz/legend_of_heropolis_mod_apk_latest_versionzr1sy.pdfIn PDF document text
    • http://rosutob.getenjoyment.net/cessna_172_maintenance_checklist.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lesodabat.epizy.com/chenab_textile_mills_annual_report_2017.pdfIn PDF document text
    • http://vidokewokesun.rf.gd/92613146223.pdfIn PDF document text
    • https://s3.amazonaws.com/gazijewevan/best_survival_knife_with_compass.pdfIn PDF document text
    • https://s3.amazonaws.com/kevava/android_10_problems_pixel_2_xl.pdfIn PDF document text
    • http://vekagurose.rf.gd/jevinebika.pdfIn PDF document text
    • http://validexa.epizy.com/navexudosarofimes.pdfIn PDF document text
    • http://zenejoku.rf.gd/juruw.pdfIn PDF document text
    • http://fatigovonid.rf.gd/how_to_read_a_south_carolina_drivers_license.pdfIn PDF document text
    • http://womopemi.epizy.com/android_telefon_klingeln_lassen.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/acrobat_reader_dc_installer.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_off0000ed93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED93 5284 bytes
SHA-256: f076e19213ac08d9f47a92367dc8582a4794f4faf4a5bab1b489284b08e93d8b
font_01_sfnt_off0000ff94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF94 9796 bytes
SHA-256: ca8187afa189d930cacd12c82347d4d0eb8497961bdde3b6a15e9ca89229617f

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