Malicious PDF — malware analysis report

Static analysis result for SHA-256 626c70881bed188b…

MALICIOUS

PDF

76.8 KB Created: 2021-02-12 22:56:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 5660e84d9446d6dbd456c3ca1d14b810 SHA-1: a3a9cbb3b9d98adebf35264bcfcf188142688e6d SHA-256: 626c70881bed188b30233b8083e58c66c09dd1cddf74335b0fe86889f32326f7
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with several pointing to disposable hosting and one identified as a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were extracted, the structure and URL analysis suggest a malicious link farm designed to lure users to harmful sites.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wb?keyword=bhoothnath%20returns%20movie%20%20hd In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381762/normal_5fd780b55abb8.pdfIn PDF document text
    • http://xubixaxar.22web.org/32523443879.pdfIn PDF document text
    • http://theandyhong.com/gugosawagozibeqwgnd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465402/normal_600e440c45194.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/gfYBf3F/35414665564.pdfIn PDF document text
    • http://tcerkovniekupola.space/la_liste_restaurant_rankings_2020zl27y.pdfIn PDF document text
    • https://cdn.sqhk.co/letiludixo/geYijRM/spiritual_gangster_sweatshirt_mens.pdfIn PDF document text
    • http://itravelgr.com/solution_survivor_zombie_outbreak5eia8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365601/normal_5fcaf73527741.pdfIn PDF document text
    • https://cdn.sqhk.co/jomonufo/YgdhjgR/73190118945.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470832/normal_5ff3ca247a68b.pdfIn PDF document text
    • https://cdn.sqhk.co/wifavizen/gcnjcL5/38581510891.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xonekalanalu.epizy.com/vowels_worksheets_for_sr_kg.pdfIn PDF document text
    • http://deravamosu.rf.gd/crime_report_form_listening_test_1_answers.pdfIn PDF document text
    • http://gezireseri.epizy.com/18904863694.pdfIn PDF document text
    • http://miduzusajaveg.rf.gd/paxafifaje.pdfIn PDF document text
    • http://pitodisile.epizy.com/warowigirigalobopex.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_off0000d9f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F3 5140 bytes
SHA-256: e8408f3603fce601074a05f888af1a4eb6637acc9e109d625f1a151d6e528507
font_01_sfnt_off0000eb44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB44 10916 bytes
SHA-256: 1140978af3ccbabc702973910c93feefc17cf92da0db0899f11a1e23f3fb65d1
font_02_sfnt_off000110ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110AE 16164 bytes
SHA-256: ebd2804bff382343e08f6a42dc45f69f4e794c08b23908ae60ba78ededae74b1

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