Malicious PDF — malware analysis report

Static analysis result for SHA-256 35ae4a7300af533b…

MALICIOUS

PDF

71.3 KB Created: 2021-04-25 13:14:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: a4c764ec393ca3120ebc53d4175ed20d SHA-1: 4141f87f0a4ecba066545c638587eb6fec911df9 SHA-256: 35ae4a7300af533be9cc5806cc33dcf0a6272655d3530ea0f943647ce48dd3ee
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' suggest the document's primary purpose is to redirect users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://mezovuduw.ru/strik?utm_term=what+if+netflix+review PDF link annotation
    • http://wulutapebime.getenjoyment.net/wilemag.pdfIn PDF document text
    • http://xupokaxe.medianewsonline.com/paint_shop_pro_tutorials.pdfIn PDF document text
    • http://xezixaz.getenjoyment.net/62312316788.pdfIn PDF document text
    • http://dodemul.mygamesonline.org/tirenotakegemuf.pdfIn PDF document text
    • http://xigotazuwal.iblogger.org/rental_agreement_template_residential.pdfIn PDF document text
    • http://nomokesus.sportsontheweb.net/char_broil_analog_electric_smoker_instructions.pdfIn PDF document text
    • http://numidib.22web.org/25668953744.pdfIn PDF document text
    • http://bosemefawixuwov.mypressonline.com/navy_advancement_quotas_fall_2020.pdfIn PDF document text
    • http://tibudirowe.mygamesonline.org/jusawinura.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1088c6ad-93b6-4fc5-9eb3-5cabf9398f67/jupop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccd72817-ed3b-44dc-accf-412fdf68692e/complete_works_of_swami_vivekananda_in_bengali_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b6afa63-ae26-4d21-ad28-ba96cee9e95d/51314346248.pdfIn PDF document text
    • https://2aa89031-56ac-4de1-b828-aabe99840ec8.filesusr.com/ugd/cf14a4_3c7b18f8fd164c04a6475641bb47eab7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb3a42e1-ffe4-4272-bcb0-99b4faccafac/sketchup_pro_2016_crack_free_download_for_mac.pdfIn PDF document text
    • https://24d1f61b-f5c5-4d2f-8180-62589f44e8d8.filesusr.com/ugd/eed56f_cbabe7f47ae34c64b8c1b2777277dc1c.pdf?index=trueIn PDF document text
    • http://zikinevubebera.epizy.com/86215232649.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45913ed6-9e9d-41da-8470-296436643bf0/biblia_hebrea_interlineal_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f75dae49-db66-495b-b0c6-b6f1adde0855/wireless-n_wifi_repeater_setup_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1ffb556-99e9-44fa-96f9-64886eeb96e9/47546108521.pdfIn PDF document text
    • http://vofekopo.rf.gd/tasanafewasaf.pdfIn PDF document text
    • http://titasukutisun.epizy.com/77611211899.pdfIn PDF document text
    • http://fabonejane.onlinewebshop.net/15458725823.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05e7aaa0-4040-4b40-92c3-671475ca7990/how_to_blend_colored_pencils_drawing_tutorial.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_off0000da65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA65 4912 bytes
SHA-256: 4a848e9045cbaa3ad812b54a16fccea486af68da5943a7f99507f9a17f4c4444
font_01_sfnt_off0000eb2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2E 10864 bytes
SHA-256: 1a06494245a17bf885410addc11c7ac6d519586c60d66e6c263c045f496d32bd