Malicious PDF — malware analysis report

Static analysis result for SHA-256 35e356ebb48a3e68…

MALICIOUS

PDF

80.4 KB Created: 2021-03-19 08:21:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e328eba736afdb928eb307a9ce374bf4 SHA-1: 72cac91adef998c8cbfc54e88455f76ce8b943b7 SHA-256: 35e356ebb48a3e684fe6da054d28fcd77540051c76ab8e6699c133d41245e833
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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 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.
  • 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://botokaw.ru/wix?keyword=nys+driver%2527s+licence+document+number PDF link annotation
    • http://jidogirikar.mygamesonline.org/does_knuckle_cracking_lead_to_arthritis_of_the_fingers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427780/normal_60187f3aeb4a9.pdfIn PDF document text
    • http://mevesepegubisis.scienceontheweb.net/a_peaceful_woman_explains_why_she_carries_a_gun_rhetorical_analysis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471945/normal_60103def35c7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419437/normal_601dcce195086.pdfIn PDF document text
    • http://xenejesujotolud.mypressonline.com/zuzuwod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451035/normal_5ff8edd1a2d89.pdfIn PDF document text
    • http://zumewidife.mygamesonline.org/diccionario_frances_espaol_larousse_pocket.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
    • https://uploads.strikinglycdn.com/files/5782ac74-ee1c-4b3b-93f8-f0e982e0ab5f/venupoxezibubinididavov.pdfIn PDF document text
    • http://najexenij.onlinewebshop.net/puditikowuw.pdfIn PDF document text
    • http://seroroxunabolu.onlinewebshop.net/sentry_safe_key_replacement_3f2.pdfIn PDF document text
    • https://4cd5a77a-be8d-44ba-8952-4177873115c4.filesusr.com/ugd/930050_f22d86ce9d1540ed9dc0baf6db638d3c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6991a8a5-02c4-4044-8913-805f7600b2a3/attack_on_titan_season_2_netflix_canada.pdfIn PDF document text
    • https://336ddc11-c37d-4cd6-9685-7accad2975f7.filesusr.com/ugd/479fa9_8067bc16cf1b45cb9bfb65453be6fa48.pdf?index=trueIn PDF document text
    • http://nevabaza.atwebpages.com/33649131427.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a069ba15-8cfc-4288-b5ec-325c14c99acc/voicelive_play_tc_helicon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c567be9c-441d-4d48-a924-9eba8a29f33e/microsoft_project_2013_free_download_with_product_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1660744-2ec4-467e-9cbc-c0a0c5b3ec42/is_william_afton_a_real_person.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/248d422a-2e6a-4817-a257-0ec2d3117b66/sonuwewinevumuwadimuw.pdfIn PDF document text
    • http://bumejefivoxigo.myartsonline.com/xinepevasutu.pdfIn PDF document text
    • http://sukokovevaz.atwebpages.com/6297666671.pdfIn PDF document text
    • https://a001dc82-f31e-4944-9b76-0a8e602b6855.filesusr.com/ugd/e4ee87_06325d81ca804c1fbb11612ab9997d74.pdf?index=trueIn PDF document text
    • https://a519209a-2b0a-481f-9fe9-460c873bdc80.filesusr.com/ugd/270e53_cd603ac935b94203bd4521790c4c9eca.pdf?index=trueIn PDF document text
    • https://9049409e-dcbb-43fe-b7cb-0f7a5d042cf1.filesusr.com/ugd/e59eee_9fb317a68171427084b020f20085574d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f295099-4ce5-4655-9e88-6feb8fc2f8f1/nordictrack_elliptical_audiostrider_990_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53c77183-73ba-4685-8ddc-7f0433cf9b60/kemper_profiler_rack_mount.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_off0000ee1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1C 5060 bytes
SHA-256: bdca187f8998f3d10fde8e9d365056bc71c07a41573d77185855da9eb32ae586
font_01_sfnt_off0000ff42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF42 10784 bytes
SHA-256: e4cce380c408b5a4a6264c230f6dae071d8c23642d3d5d8b1c67fcee5d3452a0
font_02_sfnt_off00012435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12435 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2