Malicious PDF — malware analysis report

Static analysis result for SHA-256 79182d10fb79141d…

MALICIOUS

PDF

68.4 KB Created: 2021-03-17 01:29:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 705b8487a7bc8e5f5ec5bd0d6c5a58ff SHA-1: ebc97da6cb94182189a8f5510e532840cf478972 SHA-256: 79182d10fb79141d1397b8ba42a5b1e3e5cc9f44c7a724d17191bb2fb7c6455a
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a malicious document, potentially leveraging embedded JavaScript for redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/wix?keyword=everybody+clap+your+hands+lyrics+gospel PDF link annotation
    • http://gromstroy.com/omron_blood_pressure_monitor_model_bp742n_instructions2ityu.pdfIn PDF document text
    • https://cdn.sqhk.co/kenalutaxi/hpY20hc/xenupaleripofabomuter.pdfIn PDF document text
    • http://cleaner360.shop/730949163548odj4.pdfIn PDF document text
    • http://requiremcgood.com/angry_mom_drama_korea_sub_indorft2e.pdfIn PDF document text
    • http://biotringel.shop/noniloxewb4qad.pdfIn PDF document text
    • https://cdn.sqhk.co/buvovemif/igXkGjk/25088264941.pdfIn PDF document text
    • http://originalhallyu.com/chicco_bravo_travel_system_reviewspx0qu.pdfIn PDF document text
    • https://cdn.sqhk.co/xapejinogum/U2hh5ig/90813461630.pdfIn PDF document text
    • http://submonster.xyz/robafe0fgax.pdfIn PDF document text
    • http://uscreditcheck.info/selenium_grid_tutorial_toolsqakbgse.pdfIn PDF document text
    • https://cdn.sqhk.co/jetirivotu/9MjcSgg/champions_centre_dupont.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/005e76b9-9c31-493c-aa10-576609daeed4/maulana_maududi_quran_tafseer_english.pdfIn PDF document text
    • https://d429d46a-6203-486b-8c9d-ede5597e1383.filesusr.com/ugd/419b00_f3976a36b9524a19bd3b821ea4e8be2a.pdf?index=trueIn PDF document text
    • https://ac614e2c-2e00-43e4-a80f-2c6bce9fb64b.filesusr.com/ugd/f103bb_0fef51d331b7452e9e28e38b033e2c2a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/335d58ef-b6a4-4a10-9b31-0fefdb33f3a1/73417964495.pdfIn PDF document text
    • https://08f84d9a-a880-4217-b4f3-956a60fe6fc5.filesusr.com/ugd/b3318b_762eb68a96b04081b555cc3183cc2c1d.pdf?index=trueIn PDF document text
    • https://dacf5b84-f80e-4bd8-bb7f-22aad20a1cd8.filesusr.com/ugd/285be4_5eac391183cf4143a8879e4cebd99251.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f89d26c-20ee-4eef-94b3-090b9d21376f/how_to_remove_petsafe_battery.pdfIn PDF document text
    • https://a91873a8-1f5b-4151-915d-af39eb211f25.filesusr.com/ugd/3f80ec_f2f88c42016b4a5b8bc6394f5a3dfc3d.pdf?index=trueIn PDF document text
    • https://438c9214-13ba-44a2-8469-a4c97ff43377.filesusr.com/ugd/5d46a0_2c12aff8943f450f90c735efd6741ca9.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_off0000cddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDDB 5596 bytes
SHA-256: ae4cdf31dca1ae5607123eae3ca553fad849f9ee9501cf7dbd419f063071d36b
font_01_sfnt_off0000e0e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E2 10336 bytes
SHA-256: b60e92457ce5e206e4351771bb54d3210396bf18343dab9cdb45a140388e539e

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