Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa8818099226d93e…

MALICIOUS

PDF

79.5 KB Created: 2021-02-21 00:53:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b49cc0af3f119c494c46db8946b36360 SHA-1: 31d626b651e10c424ce12a4f55d6fe9be20ac98f SHA-256: fa8818099226d93e3e86720de4447d74a35ae3c8054d2d01410b1f15603e44c7
134 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs and heuristics indicate it is a link farm designed to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The presence of urgency language further supports a social engineering attack vector.

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://bologen.ru/strik?utm_term=health+and+safety+executive+covid+spot+checks PDF link annotation
    • http://pannochki-art.com/timberjack_240_manual8kxfn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388050/normal_5ffc379a02c7f.pdfIn PDF document text
    • https://zesalefol.weebly.com/uploads/1/3/5/9/135994098/tuwuwokokona_fiwasi_titezejera_wenotadaxar.pdfIn PDF document text
    • http://zexawil.22web.org/zikevupoxujexonelo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493873/normal_600bcdab257f3.pdfIn PDF document text
    • https://rumodabumuxe.weebly.com/uploads/1/3/1/8/131857513/juxelujovebovu-dutumozuwaminu.pdfIn PDF document text
    • http://bioforcecolumbia.site/menigatomibepixajapukizud7z2q.pdfIn PDF document text
    • https://fisezogidegogef.weebly.com/uploads/1/3/2/3/132303301/tunozura_winuxuwusilam_sejibabodoto.pdfIn PDF document text
    • https://buzowupe.weebly.com/uploads/1/3/1/4/131483044/4528421.pdfIn PDF document text
    • https://fugopezawisobib.weebly.com/uploads/1/3/1/3/131383650/gowoludodu.pdfIn PDF document text
    • http://ighelpcenter.xyz/hmrc_furlough_online_hotlineadrh1.pdfIn PDF document text
    • https://xudidetopos.weebly.com/uploads/1/3/4/5/134579215/zovipopixuzakatede.pdfIn PDF document text
    • http://gprofights.ru/2987400288dlver.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nejotuwusa.rf.gd/catalogue_mockup_template.pdfIn PDF document text
    • http://nenilezum.epizy.com/waves_a_level_physics.pdfIn PDF document text
    • http://guzumirofega.epizy.com/celia_sakamoto_o_valor_da_conquista.pdfIn PDF document text
    • http://ruvesigokusi.epizy.com/movobinimimuz.pdfIn PDF document text
    • http://xusixuxoribixe.rf.gd/grade_10_math_worksheets_ontario_free.pdfIn PDF document text
    • http://nujemapamonaj.epizy.com/gupobavazanugezav.pdfIn PDF document text
    • http://zevomes.rf.gd/tobebulap.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_off0000f81d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF81D 5404 bytes
SHA-256: bbe18f37688ca75ac47bf55dd7edcea0c8cc8509f9f44513eee843ecfe55073b
font_01_sfnt_off00010a8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8D 11112 bytes
SHA-256: a9f833b158ae9d091e3305326ae324661a6c4dd0b43c9954f7195b4b2d48ef33

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