Malicious PDF — malware analysis report

Static analysis result for SHA-256 be9b4e8bcec5e352…

MALICIOUS

PDF

78.4 KB Created: 2021-03-23 07:05:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 61e1f0ee48764ebdbb4c07c12e94fae9 SHA-1: e1b8ae0f99f870db82e65146f7171a8e18ed0690 SHA-256: be9b4e8bcec5e3525974f53ea5ad469a5835c78fbfc5f6f475928eab1d2bfd89
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to disposable domains and known malicious redirectors. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the document's structure as a link farm is a common tactic for initial compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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/strik?utm_term=words+describing+moonlight In PDF document text
    • http://devicesprotectionforusers.site/ffxiv_treasure_mapsg69rs.pdfIn PDF document text
    • https://diwijavel.weebly.com/uploads/1/3/4/6/134691177/fdba5200adb3a.pdfIn PDF document text
    • https://popupobapovuzus.weebly.com/uploads/1/3/4/0/134012290/vijafulepamom.pdfIn PDF document text
    • http://pek-24.cc/how_to_level_concrete_formworkyfl2x.pdfIn PDF document text
    • http://freshnatur.fun/romumufenaralovanoloji3of1i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445882/normal_60360a8b27eda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530171/normal_6035b4e8d5d75.pdfIn PDF document text
    • http://italy50wow.pro/lulowazupixovetezatewuog0ay.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485828/normal_603ad15a48158.pdfIn PDF document text
    • https://xoxudepibedewem.weebly.com/uploads/1/3/5/3/135317482/lufigalixelobe.pdfIn PDF document text
    • http://bonboxstudio.com/the_anger_workbook_an_interactive_guide_to_anger_management2kpz6.pdfIn PDF document text
    • https://rokipidofavum.weebly.com/uploads/1/3/4/0/134042790/3189217.pdfIn PDF document text
    • http://reduslim-officialsite.site/superdry_japanese_writing_translationc9hfx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469116/normal_5ff776932d92d.pdfIn PDF document text
    • https://jajonugofetafis.weebly.com/uploads/1/3/0/7/130776034/b6a37a.pdfIn PDF document text
    • https://kibapeti.weebly.com/uploads/1/3/4/5/134515129/371ecddbb8474c.pdfIn PDF document text
    • http://xteenware.online/ladofovuzajadid3ftx.pdfIn PDF document text
    • http://cybety.xyz/black_and_decker_coffee_machine_manualp7j4o.pdfIn PDF document text
    • https://zekulereloto.weebly.com/uploads/1/3/2/7/132710655/mazexifirub-wojajofedov-wibegu.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/fosawef/muzupirugawepasi.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/pitir.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/ridunedose.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/g_shock_5146_time_set_up.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_off0000f524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF524 5296 bytes
SHA-256: 79fc6ddb0ad993aef80369756d2b0d710bacadbd07729525486df47ab6c1423c
font_01_sfnt_off00010706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10706 11108 bytes
SHA-256: f9f317d2db4df3a4a03d42ef3287afce25d1f2568c3530bf44c93ab063172b1f

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