Malicious PDF — malware analysis report

Static analysis result for SHA-256 c489eaed4bf42831…

MALICIOUS

PDF

75.2 KB Created: 2021-02-19 07:54:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 9fe4f7483e84c4c4cb15f48b9be83859 SHA-1: ce2475dda3b5dc0e33bef126a4c720b54241770f SHA-256: c489eaed4bf4283166751dc83cbc029c485b15724a87192639600a1e8bd141a6
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one specifically pointing to a URL that appears to be part of a link farm or SEO spam campaign. The ClamAV detection and ML classifier strongly indicate maliciousness, likely related to phishing or malware distribution via these links. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/strik?utm_term=garmin+dezl+570lmt-d+review PDF link annotation
    • https://zizojatemizowen.weebly.com/uploads/1/3/4/0/134016780/c37ceb120c6e7.pdfIn PDF document text
    • https://cdn.sqhk.co/juzivadareka/rBhdggh/73361981367.pdfIn PDF document text
    • https://revevapeseguv.weebly.com/uploads/1/3/5/3/135387876/lelawadavub_xakuma.pdfIn PDF document text
    • http://all-host.site/203960498254xfqo.pdfIn PDF document text
    • https://zevebijupaxize.weebly.com/uploads/1/3/4/7/134754497/galipunude.pdfIn PDF document text
    • https://lidafeli.weebly.com/uploads/1/3/4/6/134683499/1223745.pdfIn PDF document text
    • https://cdn.sqhk.co/mexovaru/djeTjhw/87280186535.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/pirofopafu/mitixipasezi.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/94549741831.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/tubinuviguvifulos.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/demographic_form_meaning_in_urdu.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/jolubedewozakaxesusu.pdfIn PDF document text
    • http://sogonuvusawi.epizy.com/arya_3_full_movie_free.pdfIn PDF document text
    • http://koriguno.rf.gd/atualizao_android_lg_k10_power.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/memixalezubupawujimeso.pdfIn PDF document text
    • http://jobizezum.epizy.com/energy_forces_and_motion_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/powerpoint_template_design_free_2007.pdfIn PDF document text
    • http://tumoxotakim.epizy.com/benifatupasumoputujerepur.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_off0000e803.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE803 5404 bytes
SHA-256: cdd5c72541c3ed75933cd515f026cf4c81f27e9f2bcd584e4eca192197abd5c6
font_01_sfnt_off0000fa78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA78 11400 bytes
SHA-256: ce230e6c1c77053d0409450e2bc7c1d90ea6171e74381e94ba49a4a12a19461b

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