Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea435bd3b023dd03…

MALICIOUS

PDF

116.3 KB Created: 2021-02-12 17:19:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b6efdc611381ddce7096304922cabbaf SHA-1: 67f0635c112b6952e520b4a508f744ff4c0af847 SHA-256: ea435bd3b023dd0354f133ae7fe121736df323a6594fcdd2fcd77e4d34761a14
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. The PDF contains numerous embedded URLs pointing to link farms and disposable hosting, suggesting a phishing or SEO abuse campaign. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious intent, likely to redirect users to harmful content or facilitate further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://leonvi.ru/123?utm_term=anima+weapon+quest+ffxiv PDF link annotation
    • https://cdn.sqhk.co/geroterunetu/4Mgesgg/7-_eleven_inc._financial_statements.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467273/normal_5fc84c45b89a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501045/normal_5fd10c9d6359a.pdfIn PDF document text
    • http://juwatorota.22web.org/clean_up_checklist_template.pdfIn PDF document text
    • https://cdn.sqhk.co/zolaxadivowe/a7t4sid/soccer_live_score_apk_download.pdfIn PDF document text
    • https://mulokigapasol.weebly.com/uploads/1/3/1/0/131070847/xudaximudegapasikex.pdfIn PDF document text
    • http://ramosek.iblogger.org/bangkok_tour_guide_tripadvisor.pdfIn PDF document text
    • https://pukapukipek.weebly.com/uploads/1/3/4/6/134636258/27a04df03a547a4.pdfIn PDF document text
    • https://cdn.sqhk.co/pobopuwubox/gi4ojfK/dancing_on_my_own_chords_piano_calum_scott.pdfIn PDF document text
    • https://mezepobavufu.weebly.com/uploads/1/3/4/7/134717124/wojasudotisuduwezis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412897/normal_600275ff4d52a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386073/normal_5feb05a102bc2.pdfIn PDF document text
    • https://wagimudo.weebly.com/uploads/1/3/4/4/134475497/9eafdc.pdfIn PDF document text
    • https://cdn.sqhk.co/xefilelo/idLggGu/business_plan_outline_template.pdfIn PDF document text
    • https://zukixuvaxetili.weebly.com/uploads/1/3/5/9/135988851/7857ca6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452839/normal_5fff0e6d4d28d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422137/normal_5ff1c271a1251.pdfIn PDF document text
    • http://pokulumaj.iblogger.org/46887437710.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vakorizu.epizy.com/11586993893.pdfIn PDF document text
    • http://gukupexokopiwug.epizy.com/95255818938.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016256.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16256 2900 bytes
SHA-256: 40ce0bc9b113ef031639604f059b60aa9f1e41b097d60e75bfbf620cccc66306
font_01_sfnt_off00016c9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C9A 5252 bytes
SHA-256: e345143f706e0c9c974dc1430edc91a45c8b498935107c2e43b0c3fb8f2cd83e
font_02_sfnt_off00017e86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E86 2076 bytes
SHA-256: 351fe6c10cd6078bfc4d57aa4ee773bed517b6c680c55aceeadcbe8a752ffd14
font_03_sfnt_off00018788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18788 10792 bytes
SHA-256: eebfaec18edb27a6b42dfd945a1b0152ea5a2ea8cc09add18b34b244c61610e9
font_04_sfnt_off0001ac89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AC89 16220 bytes
SHA-256: 3927553ad056e6a6001d84d1a4bb070fa0753c5e1110d0c244af727dfd9b5ef0