Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7ed616ef3fd9a4a…

MALICIOUS

PDF

119.3 KB Created: 2021-02-16 08:59:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: a22e78f16ae74a3fd028f8469ff7ff19 SHA-1: 1bf9137fd32d454392c23938bd22555994b1c803 SHA-256: f7ed616ef3fd9a4ae6dc55598ffbe1846eeec22a280469df7bc9bb500a29c939
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing and malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicates a malicious intent to use these links for deceptive purposes. While no scripts were explicitly extracted, the nature of the embedded URLs and the ML classifier's high confidence suggest this PDF is designed to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

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://baarspo.ru/123?utm_term=relationship+between+democracy+and+education+ppt PDF link annotation
    • http://vulgargirls.fun/przymiotniki_dzierawcze_angielski_wiczenia_dla_dzieci0aqia.pdfIn PDF document text
    • http://getakabawi.22web.org/motikopizebasaven.pdfIn PDF document text
    • http://ehaberdevlet.com/mac_os_sierra_iso_image_free_downloadrjjk0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450864/normal_5fecfeb38a32c.pdfIn PDF document text
    • https://cdn.sqhk.co/nogorodizet/hjfJgdU/foderamexukakinodone.pdfIn PDF document text
    • http://zuvels.xyz/15983319008nvnu3.pdfIn PDF document text
    • http://tevfikyuce.xyz/66249312543fa4a0.pdfIn PDF document text
    • http://lajibodomemebev.66ghz.com/paretutuzafigitamogolep.pdfIn PDF document text
    • http://igclienteam.com/wow_classic_herb_leveling_guide7utfw.pdfIn PDF document text
    • http://copyright-services-us.com/napazirolifoxagahsedj.pdfIn PDF document text
    • http://agent-ritual495.online/66908518268piujg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446781/normal_5ffec116a4373.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368242/normal_5fe33dc2f16b0.pdfIn PDF document text
    • http://moxolesapudeli.22web.org/luresupix.pdfIn PDF document text
    • https://cdn.sqhk.co/suxepemup/jbliiLZ/drill_down_excel_formula.pdfIn PDF document text
    • https://cdn.sqhk.co/nasanoroge/etia4gg/.pdfIn PDF document text
    • http://egosikenclub.com/83174517347ry72p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383561/normal_5fe9b0192fd37.pdfIn PDF document text
    • https://cdn.sqhk.co/daxozazon/jcgiXpF/pigomoxipudofepuxukokijez.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://gitogopafo.epizy.com/vilemilalojokuxar.pdfIn PDF document text
    • http://zupibejozoge.rf.gd/93988020773.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18107 5536 bytes
SHA-256: cafcd68cae13d46de978d73db418ba31c38af548af5576a66546cd878b796159
font_01_sfnt_off000193b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x193B4 15008 bytes
SHA-256: 0fda719ad57ed6466b375b3a7f057de6f160df80dcfd29d2fe65d8d78b17666d
font_02_sfnt_off0001c10a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C10A 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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