Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c7d2ce254f41a6c…

MALICIOUS

PDF

76.2 KB Created: 2021-03-21 01:24:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: fcac725f3c22b9662035b06b2daaf7b6 SHA-1: 3171594313b70f1a3af5fa17278c2d3121b42f29 SHA-256: 8c7d2ce254f41a6cc568d5cad7ea446fef3854a91ddcf752bef023b3b84b32fb
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/strik?utm_term=osha+laser+safety+officer+requirements PDF link annotation
    • http://korogesubelokut.mypressonline.com/jesuit_oath_of_the_fourth_vow.pdfIn PDF document text
    • http://gaximivotekole.mypressonline.com/american_heart_association_acls_guidelines_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377928/normal_6007b01a5f691.pdfIn PDF document text
    • https://bapamebitisetup.weebly.com/uploads/1/3/4/3/134325238/riwivumi.pdfIn PDF document text
    • http://jotusimemirido.sportsontheweb.net/icao_doc_10057.pdfIn PDF document text
    • https://tekaxudifen.weebly.com/uploads/1/3/5/9/135992886/8252504.pdfIn PDF document text
    • http://kesisofawa.mygamesonline.org/libro_de_historia_universal_contemporanea_pearson.pdfIn PDF document text
    • http://timisodagajid.22web.org/how_to_whitewash_black_painted_furniture.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480748/normal_604d01abd7956.pdfIn PDF document text
    • http://dexowowijovovu.iblogger.org/copy_outlook_contacts_into_excel_spreadsheet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494430/normal_5fceef4cbf6eb.pdfIn PDF document text
    • https://zokesafan.weebly.com/uploads/1/3/0/7/130775675/5053450.pdfIn PDF document text
    • https://nugukijozagesek.weebly.com/uploads/1/3/0/7/130739433/827eb056c25c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385614/normal_5fe63d4f4e0fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415739/normal_5fd958ff1b961.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mobukug.myartsonline.com/capacity_building_books.pdfIn PDF document text
    • http://bemabam.myartsonline.com/gorijebuzekiweloti.pdfIn PDF document text
    • http://rulamiji.onlinewebshop.net/sidopen.pdfIn PDF document text
    • http://muluwokixo.onlinewebshop.net/xujojixagesofimodoburuleb.pdfIn PDF document text
    • http://teperudoli.rf.gd/rapawamabapefadokoluno.pdfIn PDF document text
    • http://wofajigu.rf.gd/blender_simple_animation_tutorial.pdfIn PDF document text
    • http://nodafawujanego.rf.gd/93942939338.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_off0000ee8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8A 5376 bytes
SHA-256: cf4659dd2c7f13d3f12cab6d81230b568dca82b3428b86a1cb5ac46c2149c8c9
font_01_sfnt_off000100b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B2 10060 bytes
SHA-256: b86f36c43559795591c2313f959b68cf468caf9b16a1ff9d050869237eb49902

Open this report in the interactive analyzer, or submit your own file for analysis.