Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1014bd777969443…

MALICIOUS

PDF

72.2 KB Created: 2021-04-03 20:33:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 0577837018d6397f31a2c77d75ca24c5 SHA-1: 12e19eb86f4784e3615f28223f36336870ada765 SHA-256: a1014bd7779694437223a421c8f606b78edc17f76b9f9ea81a5f92da1b916c47
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm designed to obscure malicious destinations. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document, potentially leveraging embedded JavaScript for redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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://ponafet.ru/award?keyword=enanitos+verdes+tu+carcel+acordes+pdf PDF link annotation
    • http://jerimujolegem.medianewsonline.com/proofreading_worksheets_with_answers_grade_4.pdfIn PDF document text
    • http://juraxoxodas.scienceontheweb.net/wesoti.pdfIn PDF document text
    • http://kebotup.66ghz.com/ropimopepifasevapegufur.pdfIn PDF document text
    • http://musiderogot.22web.org/hayward_chlorinator_cl2002s.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420020/normal_605367de1d7e1.pdfIn PDF document text
    • http://rosativiwam.mypressonline.com/56828871656.pdfIn PDF document text
    • http://nafarami.medianewsonline.com/tekofetebixed.pdfIn PDF document text
    • http://kimidenexikox.getenjoyment.net/8526679493.pdfIn PDF document text
    • http://kazexezawulozij.mypressonline.com/deep_learning_autoencoder.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409092/normal_5fc932f58d388.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416512/normal_5fdc2f6a28789.pdfIn PDF document text
    • http://nujagexurej.medianewsonline.com/andhra_pradesh_districts_and_mandals_list.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486206/normal_6040789aa7cab.pdfIn PDF document text
    • http://pimolala.22web.org/automatic_control_textbook.pdfIn PDF document text
    • http://gapilojazixo.getenjoyment.net/barisan_nasional_manifesto.pdfIn PDF document text
    • http://foramodosug.mygamesonline.org/presentation_signpost_expressions.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wigugagekubog.rf.gd/xanalinukiw.pdfIn PDF document text
    • http://lopakesuzuw.atwebpages.com/ribimowivemijo.pdfIn PDF document text
    • http://zugulikusofa.rf.gd/8325362037.pdfIn PDF document text
    • http://kifemulawej.epizy.com/miller_dialarc_hf_3_phase.pdfIn PDF document text
    • http://nutimuratibuzur.epizy.com/angular_5_template_if_else.pdfIn PDF document text
    • http://gixiluvigatekij.atwebpages.com/11058738312.pdfIn PDF document text
    • http://tijekozevapika.epizy.com/dubaz.pdfIn PDF document text
    • http://tapomizo.rf.gd/91779056207.pdfIn PDF document text
    • http://revupeponalewuj.epizy.com/22799611302.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_off0000dba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA5 5164 bytes
SHA-256: 37db3155b09ffcf88df1244ddc8ad288967e09628a034ddbba4e6f9bd34d6b4a
font_01_sfnt_off0000ed52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED52 11352 bytes
SHA-256: 76b1b3e961e25a7a3012ed9b57bde5fc60b8942453aebca3768e49399503fe1f

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