Malicious PDF — malware analysis report

Static analysis result for SHA-256 01c19a65ac6edc98…

MALICIOUS

PDF

69.3 KB Created: 2021-02-02 14:51:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: fbd4d678c2c79f6327b0ae29b6850686 SHA-1: 9acf2a227b71434e532da3a3970019451dd4bb04 SHA-256: 01c19a65ac6edc98ea223397846fa3dfef8cc9c5aafcdb5a810c83d04c21bea5
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous external URIs pointing to disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an exploit or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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=ss7g2+enduring+understanding%252Fessential+questions PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4408853/normal_5fc9608ee65ec.pdfIn PDF document text
    • https://cdn.sqhk.co/saboxiwago/ozidyje/45493447188.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488317/normal_5fc6f03275079.pdfIn PDF document text
    • https://warubexe.weebly.com/uploads/1/3/4/6/134647576/3210692.pdfIn PDF document text
    • http://ligewazojo.iblogger.org/savizaguxe.pdfIn PDF document text
    • http://nesapumedavemag.iblogger.org/vehicle_log_book_template.pdfIn PDF document text
    • https://tefojemitadu.weebly.com/uploads/1/3/1/6/131606809/saxesesawufux-babojif.pdfIn PDF document text
    • https://nelizozab.weebly.com/uploads/1/3/0/8/130874358/1451445.pdfIn PDF document text
    • http://cozyplacefor.rest/bosch_brute_jackhammer_handle5ovdn.pdfIn PDF document text
    • http://auto-fishing-rods1.club/2007_kia_sorento_service_manualc48kn.pdfIn PDF document text
    • https://gunimumatepatu.weebly.com/uploads/1/3/5/3/135313318/2094840.pdfIn PDF document text
    • http://blablablacar.online/kenshi_slavery_mod9365b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502698/normal_5fd1fc9a716fc.pdfIn PDF document text
    • http://yewes.fun/cuestionario_de_excel_resuelto4451d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477401/normal_5fdeeed9bca0b.pdfIn PDF document text
    • https://cdn.sqhk.co/talegejusa/hbjjjfq/pobetofekubise.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
    • https://s3.amazonaws.com/vofadoloves/67475777242.pdfIn PDF document text
    • http://lixanixuzuki.rf.gd/15612691547.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/nidad.pdfIn PDF document text
    • http://fewetero.epizy.com/bunovezixopejunizikij.pdfIn PDF document text
    • http://dupevinituz.epizy.com/dashboard_template_html.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/16155155223.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_off0000c568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC568 5352 bytes
SHA-256: 5474be15eadcbcf4bba7131a4a18ca8728040a12ab78d5e2d1aeda4b6eb1d292
font_01_sfnt_off0000d7a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A2 10000 bytes
SHA-256: 4836b4f6400767b094b3a32332d338e8c9300f247dcffd1fe279429da5ffafb8
font_02_sfnt_off0000f985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF985 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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