Malicious PDF — malware analysis report

Static analysis result for SHA-256 d585b81d085f4ee1…

MALICIOUS

PDF

76.7 KB Created: 2021-03-18 08:29:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: febb76a77ba9f091171299185e7da20e SHA-1: 5fb39b29c51a4db629ffc281e2c6342f66144885 SHA-256: d585b81d085f4ee154299deb8c95dcc9e8ded65751b2d8c40786bafa8f29eeba
134 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection, indicating malicious intent. The presence of numerous external URIs and a link farm structure suggests a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with attempts to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • 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://xezojetit.ru/strik?utm_term=peter+senge+5+disciplines PDF link annotation
    • http://azalea.store/10_500_cool_facts_about_angel_fallsh0fdu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373240/normal_5fdabedb1d92f.pdfIn PDF document text
    • http://dumubemajizukov.medianewsonline.com/maschine_mikro_mk1_manual.pdfIn PDF document text
    • http://mivetys.xyz/98385253309oyo6g.pdfIn PDF document text
    • http://wivuperafuzo.mypressonline.com/calendario_laboral_2020_mexico.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426974/normal_5fd0664ee48de.pdfIn PDF document text
    • http://laludinemolat.sportsontheweb.net/sinemizevuvik.pdfIn PDF document text
    • http://kupiokno.su/cognitive_perspective_weaknesses8fr7d.pdfIn PDF document text
    • http://zujejilolo.scienceontheweb.net/efectos_de_la_contaminacion_atmosferica.pdfIn PDF document text
    • http://libopadu.scienceontheweb.net/winegard_carryout_g2_power_inserter.pdfIn PDF document text
    • http://medemukiduba.sportsontheweb.net/youth_football_tackling_drills_youtube.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463034/normal_5fda398911710.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wopojofa.atwebpages.com/18921721595.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f8ae006-dbb6-4385-ad88-05333fe767ef/what_kind_of_oil_does_a_2007_toyota_rav4_take.pdfIn PDF document text
    • https://d54d55f4-8004-4613-9f19-7b96cbed0ae7.filesusr.com/ugd/ce4b32_34ea9692c4da4c1db05c235d30eae406.pdf?index=trueIn PDF document text
    • https://98cdd5c5-c43e-49eb-9373-39517e896cbb.filesusr.com/ugd/90661f_b2c748cec0d346d59b1a6453a7a71d06.pdf?index=trueIn PDF document text
    • http://zigakakedulogim.myartsonline.com/goxuvawujezapowu.pdfIn PDF document text
    • https://ff9dba89-6132-4485-99c2-ace8a2453124.filesusr.com/ugd/c3f59f_8d6f8e2b8aeb4f2d8fdbab63264ed107.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e9b8206-958c-41f0-b299-a44e2d7ad7e6/how_much_is_a_smith_corona_electric_typewriter_worth.pdfIn PDF document text
    • https://98cdd5c5-c43e-49eb-9373-39517e896cbb.filesusr.com/ugd/90661f_2aa5cfceeb934948a62ac9dacb8e84a5.pdf?index=trueIn PDF document text
    • http://mawidinivetobi.myartsonline.com/bogimexamoxanu.pdfIn PDF document text
    • http://zitasixan.atwebpages.com/what_is_written_law_in_malaysia.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_off0000ebc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC9 5156 bytes
SHA-256: 99fcbb3ad13331ef0a4a9e31e3e57fd50b0d066550c739d0634a67e58e93a80e
font_01_sfnt_off0000fd68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD68 11244 bytes
SHA-256: 8388d3edafd5eda21d046afea19270e5653af3dda617a0c616a1b12f9aa9550a