Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ea5c5cc12ee43b5…

MALICIOUS

PDF

112.4 KB Created: 2021-02-21 04:49:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: e0052ed84f70624a3bf5a395b18d7b94 SHA-1: f52823ddad8539ff502915681b184bcd9925cb2d SHA-256: 0ea5c5cc12ee43b5bb4f56116262eda2e2fc973d8c7253f85b6adcdc194a14f3
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains like 'weebly.com' and 'sqhk.co', suggesting a link farm for SEO manipulation or to distribute further malware. The presence of external URIs and the overall structure point towards a phishing or malware distribution scheme, likely delivered via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=tears+we+cannot+stop+pdf+download PDF link annotation
    • https://rigopodi.weebly.com/uploads/1/3/4/3/134307943/gavuzeduzosij.pdfIn PDF document text
    • https://cdn.sqhk.co/ponesigis/nVcsjbe/wunesejigukutofewiwibu.pdfIn PDF document text
    • https://bebibamo.weebly.com/uploads/1/3/1/4/131438385/ruluxorezofagokul.pdfIn PDF document text
    • https://cdn.sqhk.co/vakanaju/gjcidjj/angie_s_list_login.pdfIn PDF document text
    • https://torosiwetub.weebly.com/uploads/1/3/5/3/135351177/rididiwizi-lepazunidaxekad-letuxonu.pdfIn PDF document text
    • https://dibovasejul.weebly.com/uploads/1/3/1/0/131070518/gapowugug.pdfIn PDF document text
    • https://cdn.sqhk.co/jorisuzil/feEjjii/32819480352.pdfIn PDF document text
    • https://tupivoxutod.weebly.com/uploads/1/3/4/4/134467409/89f21.pdfIn PDF document text
    • https://cdn.sqhk.co/lululitoj/hjxjiqs/mtg_tournaments_near_me.pdfIn PDF document text
    • https://ronurakegilapoz.weebly.com/uploads/1/3/4/8/134852428/667c1c64627102.pdfIn PDF document text
    • https://zimegusak.weebly.com/uploads/1/3/4/6/134605775/gibevo-pobadok.pdfIn PDF document text
    • https://cdn.sqhk.co/tibapopedeka/dgfiajh/74540629456.pdfIn PDF document text
    • https://gufofusubovara.weebly.com/uploads/1/3/5/3/135323195/781ffed8e2ef613.pdfIn PDF document text
    • https://javesuput.weebly.com/uploads/1/3/0/8/130873829/9536d3af9f.pdfIn PDF document text
    • https://demavagof.weebly.com/uploads/1/3/4/0/134017100/totimogepofegid_pusomarunuxepid_podup_pumakipob.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bubisifapagefe/78946016009.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/76723455451.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/83300989017.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18047 5188 bytes
SHA-256: b6985d836a994777758550de56dc9c7ab483740f2fc1a7a1da1500086c3d56a0
font_01_sfnt_off0001920f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1920F 9904 bytes
SHA-256: 2aab236b3d5e6d495cc889c12d63c83a5d703b550f570960a8f9ed10b37e99cb

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