Malicious PDF — malware analysis report

Static analysis result for SHA-256 158d9b5c5c029ab9…

MALICIOUS

PDF

77.4 KB Created: 2021-02-20 17:51:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: fe63afd2a818e3efb50b154d8ba65e09 SHA-1: a6d02d3429dd6e1e3f2d52eb4302ec0a3e1daa03 SHA-256: 158d9b5c5c029ab95bd26303bd8d135314fca13c7c55c2600f9e31b22101e1a5
134 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm designed to redirect users. The presence of invoice-related language further supports a phishing or scamming attempt. Although no scripts were explicitly extracted, the PDF structure and numerous embedded URLs indicate it is likely designed to lead the user to a malicious site, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://baarspo.ru/strik?utm_term=how+to+remove+oceanic+dive+computer+from+console PDF link annotation
    • https://fenanenu.weebly.com/uploads/1/3/4/2/134265689/funopone.pdfIn PDF document text
    • http://bonusiotsbera.online/chainsmokers_latest_song_2018ipzwq.pdfIn PDF document text
    • https://gabejopow.weebly.com/uploads/1/3/4/5/134597712/dujagoki.pdfIn PDF document text
    • http://skidki-day.store/papajajarelixorazelb4ez0.pdfIn PDF document text
    • https://pesasujax.weebly.com/uploads/1/3/4/8/134882000/buluwewoxudog-zubunaropog.pdfIn PDF document text
    • https://polavimiwusirew.weebly.com/uploads/1/3/2/6/132681763/wenatenajo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484365/normal_5fd8bd79d8624.pdfIn PDF document text
    • http://esmoney.site/podadinu367ud.pdfIn PDF document text
    • https://xazulifego.weebly.com/uploads/1/3/4/7/134727283/ropusefugupe-foxufu.pdfIn PDF document text
    • https://fitokuzigijot.weebly.com/uploads/1/3/4/6/134681543/b3662c67251.pdfIn PDF document text
    • http://paksorond.xyz/baseball_batting_average_spreadsheet6vz5y.pdfIn PDF document text
    • https://vipofobusaxipol.weebly.com/uploads/1/3/4/2/134234766/310f253.pdfIn PDF document text
    • https://gopadafuwidu.weebly.com/uploads/1/3/0/7/130740623/jagoromikomovi_pusuwejizaxovi_fuditoda_rusarovuw.pdfIn PDF document text
    • https://mimuromujalu.weebly.com/uploads/1/3/0/7/130739347/xazuvonezepina_vuwijurov_razitakajusavaw_lavamepudemito.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468255/normal_5ffe9f88df696.pdfIn PDF document text
    • http://nout-prokat.website/92669962680kvrc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415519/normal_6019dd784d55f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427506/normal_602479e16ee42.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/sefabe/ubuntu_10._04_32_bit_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/gupifarovivuriwug.pdfIn PDF document text
    • https://s3.amazonaws.com/metakibeme/lexefonikabirutelufo.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_off0000f002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF002 5412 bytes
SHA-256: 160128bee46b649b14bc33f2f7e7403f247b5cf5cbce7e833e278e381105d788
font_01_sfnt_off00010269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10269 11116 bytes
SHA-256: 4dcfc708eece0b5216e8dc01522e77291220c79530220ac3dbd95f657e557629

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