Malicious PDF — malware analysis report

Static analysis result for SHA-256 890d978db16d1e09…

MALICIOUS

PDF

72.8 KB Created: 2021-02-18 14:58:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 47a06b6c09b635d0a8d7cc82734535af SHA-1: a6d35f6b64d9f6374e92f3a58b928a1187783c44 SHA-256: 890d978db16d1e0969250b03a848710371d7e6499c39c12039305e5d577f745f
134 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains numerous external URIs, many pointing to disposable hosting and forming a link farm, suggesting an attempt to obscure the true malicious destination. The document body, though heavily obfuscated, contains text related to downloading a book, which is a common lure for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://druttle.ru/strik?utm_term=pakistan+studies+book+9th+class+in+urdu+download PDF link annotation
    • https://funofumid.weebly.com/uploads/1/3/4/8/134886651/6921614.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371814/normal_5ff81df141545.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425726/normal_5ff85ba6521b2.pdfIn PDF document text
    • https://nemabofafuz.weebly.com/uploads/1/3/5/3/135389169/2215262.pdfIn PDF document text
    • https://gujowidupisume.weebly.com/uploads/1/3/4/1/134131448/8103217.pdfIn PDF document text
    • http://naturmilans.fun/lotozavovisu5lr3y.pdfIn PDF document text
    • https://dunelakanova.weebly.com/uploads/1/3/1/4/131410870/fufadep.pdfIn PDF document text
    • http://pusaburuku.22web.org/19929605566.pdfIn PDF document text
    • http://copyrightshelpcenter.com/vermont_castings_intrepid_2_parts_listvnu69.pdfIn PDF document text
    • http://rusakova.space/independent_accountant_s_compilation_report_2018m79uk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489853/normal_5fd3417693b48.pdfIn PDF document text
    • https://sefokuto.weebly.com/uploads/1/3/0/7/130738721/8196529.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383699/normal_5fd61f6c4f72d.pdfIn PDF document text
    • http://littlenat.space/fidiwemoxafufajenoiflmp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460686/normal_6003fd4a0b035.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
    • http://fesonukoropirum.rf.gd/sheet_erosion_definition_in_science.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/56177778782.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/66211719606.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_off0000d252.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD252 5364 bytes
SHA-256: 6600ade6d0097839e4c6fcc1cbee6f4bdb8f94626444718990253551d41a775a
font_01_sfnt_off0000e483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE483 10268 bytes
SHA-256: fb011b49020408b5ec6abf53b7f83e4bbd24388e8e0cb3dd02d5651d218bfb8f
font_02_sfnt_off00010796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10796 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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