Malicious PDF — malware analysis report

Static analysis result for SHA-256 8030cc5777e81d87…

MALICIOUS

PDF

81.4 KB Created: 2021-03-30 21:44:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 43063c1e974b30f5e79229fb0fde32ba SHA-1: 89485240c6bda9a13212776331d351a1f9de0d56 SHA-256: 8030cc5777e81d877ccd7253a61760db7e1da950f319a133d3f729d0f328e666
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to suspicious domains, and is flagged as a link farm. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=dead+target+apk+android PDF link annotation
    • http://hookup753.fun/jokovobaxuxap7x2hv.pdfIn PDF document text
    • http://coins24h.com/employment_letter_template_canadabsx0i.pdfIn PDF document text
    • https://cdn.sqhk.co/gufojakig/bicSy1f/30191600946.pdfIn PDF document text
    • http://allieshouseofhope.com/130519121028g8cl.pdfIn PDF document text
    • http://bcpzonasegurape2-viabcp.com/how_to_make_dunkin_donuts_frozen_coffeejngrv.pdfIn PDF document text
    • http://bilkaita.space/sudazilojifekesorrhc4.pdfIn PDF document text
    • https://cdn.sqhk.co/xogovofofi/Wbigbi9/88493137514.pdfIn PDF document text
    • http://reduslimitaly-ufficiale.website/how_to_activate_architect_7il4yk.pdfIn PDF document text
    • http://gejodumegemato.22web.org/favevufelokabonelotuxakow.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • http://koprovk.xyz/bagovetomodlqk1.pdfIn PDF document text
    • https://cdn.sqhk.co/kagaxavog/kNqEgsG/sql_server_2012_tutorial_for_beginners.pdfIn PDF document text
    • http://toppiksnack.xyz/anycast_m2_manual1msht.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/039ec260-4532-46dd-85da-66073dbcf8ab/fizaboxe.pdfIn PDF document text
    • http://sixanuramusasit.epizy.com/56963447502.pdfIn PDF document text
    • https://00f02ae0-031c-4cf4-85c3-86bbc6d7deb2.filesusr.com/ugd/13f2e4_f15f1c83b0ce4cb2953ff817929e450a.pdf?index=trueIn PDF document text
    • https://e2604e0b-f95a-4acb-b53f-a7db3827b2a1.filesusr.com/ugd/225520_ea59e57c04b842dea060479903b58251.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/187652ac-f6a2-4c6e-bbb2-6efec80912f5/2018_toyota_camry_hybrid_xle_for_sale.pdfIn PDF document text
    • https://98748e4b-3258-471a-903e-8ea98415cca0.filesusr.com/ugd/fd7405_7b5a426bf3074bfda0ab2ef7411dc63e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/672bb3b3-0d40-4357-9766-d74ed22ab0e4/jepaze.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC18 4980 bytes
SHA-256: 276d8f50488e8316d1b8cfe85bb80e0111e8536eceace668e0fba960794fd1e0
font_01_sfnt_off0000fd23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD23 11100 bytes
SHA-256: 3ce2df76ddf4b0ae48c2db303603cbc267442f9ce4d68a3d7d240c6d273fe384
font_02_sfnt_off00012342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12342 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848

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